Back to runner search
SO
Sean O'Brien
MaleMassachusetts1998–2026
141
Total Finishes
101
Different Races
25
States (50%)
0:28:10
PR (2:09/mi)
2:00:46
Average
+0:32:25
Slower (first to last)
Medal House
2004
Dole Great Race of Agoura Hills
1:41:16
#43 overall#40 gender
2004
Jacksonville Bank Marathon, Half Marathon
1:41:40
#129 overall#105 gender
2003
New Bedford Half Marathon
1:42:52
#471 overall#392 gender
2003
Run SF "Golden Gate City" 5K/10K/13.1
1:48:45
#316 overall#252 gender
2002
Beer City Half™ San Diego
1:29:33
#208 overall#178 gender
2001
Bakersfield Marathon
1:26:25
#14 overall#14 gender
2001
Beer City Half™ San Diego
1:30:43
#184 overall#157 gender
2001
Hyannis Marathon
1:37:54
#105 overall#90 gender
2001
Fairfield Road Races
2:03:43
#1171 overall#831 gender
1999
Hyannis Marathon
1:35:43
#71 overall#59 gender
1998
Hyannis Marathon
1:35:32
#90 overall#82 gender
1998
New Bedford Half Marathon
1:36:24
#293 overall#271 gender
Performance Timeline
Complete Race Log
| Year | Race | State | Time | Place |
|---|---|---|---|---|
| 2026 | Frederick Running FestivalFrederick | MD | 1:47:16 | #475 |
| 2026 | Sprouts Mesa - Phoenix MarathonMesa | AZ | 2:07:57 | #1878 |
| 2025 | Huntersville HalfHuntersville | NC | — | — |
| 2025 | Chicago 13.1Chicago | IL | 1:49:51 | #2036 |
| 2025 | B.A.A. Half MarathonBoston | MA | 2:04:00 | #3005 |
| 2025 | Philadelphia MarathonPhiladelphia | PA | 2:10:01 | #5832 |
| 2025 | Toyota Music Factory Half MarathonIrving | TX | 2:12:34 | #355 |
| 2024 | Presidio 10 RaceSan Francisco | CA | 1:38:26 | #29 |
| 2024 | OC Marathon - Half Marathon - 5KNewport Beach | CA | 1:39:06 | #384 |
| 2024 | Capital City Half MarathonColumbus | OH | 1:43:33 | #459 |
| 2024 | Berkeley Half MarathonBerkeley | CA | 1:44:07 | #487 |
| 2024 | Milwaukee Lakefront MarathonMilwaukee | WI | 1:47:51 | #215 |
| 2024 | Huntersville Half MarathonHuntersville | NC | 2:18:00 | #486 |
| 2024 | Frederick Running FestivalFrederick | MD | 2:20:10 | #1568 |
| 2024 | Frederick Running FestivalFrederick | MD | 2:20:11 | #1570 |
| 2023 | Berkeley Half MarathonBerkeley | CA | 1:44:26 | #465 |
| 2023 | Marquette MarathonMarquette | MI | 1:46:07 | #96 |
| 2023 | Route 66 Marathon & Half Marathon, Marathon RelayTulsa | OK | 1:50:30 | #296 |
| 2023 | Flying Pig Pump and RunCincinnati | OH | 1:57:53 | #1470 |
| 2023 | YMCA Critz Tybee RunTybee Island | GA | 2:12:09 | #123 |
| 2023 | Critz Tybee Run FestSavannah | GA | 2:12:09 | #121 |
| 2023 | Historic Half Training (sponsored by FARC)Fredericksburg | VA | 3:16:28 | #2781 |
| 2023 | LT Michael P. Murphy Run 15K & 5KHauppauge | NY | 3:21:34 | #478 |
| 2022 | Huntersville HalfHuntersville | NC | 2:14:45 | #402 |
| 2022 | Huntersville Half MarathonHuntersville | NC | 2:14:46 | #402 |
| 2022 | TripleThreat Half Marathon & 5KRockport | MA | 2:17:51 | #169 |
| 2022 | Historic Half Training (sponsored by FARC)Fredericksburg | VA | 3:54:10 | #2924 |
| 2021 | 2026 Beaverton Half Marathon, 5/10K Presented by NIKEBeaverton | OR | 2:02:47 | #163 |
| 2021 | Catalina Island Half MarathonCatalina Island | CA | 2:03:42 | #31 |
| 2021 | Huntersville Half MarathonHuntersville | NC | 2:05:03 | #308 |
| 2021 | Huntersville HalfHuntersville | NC | 2:05:03 | #308 |
| 2021 | South Shore *3 Beach Minimum" Half Marathon 2026Hull | MA | 2:14:44 | #230 |
| 2021 | South Shore 3 Beach Minimum | — | 2:14:44 | #230 |
| 2021 | Joshua Tree Half MarathonJoshua Tree | CA | 2:24:24 | #607 |
| 2020 | Ventura MarathonVentura | CA | 1:44:45 | #8 |
| 2020 | Historic Half Training (sponsored by FARC)Fredericksburg | VA | 3:32:24 | #4450 |
| 2019 | Catalina Island Half MarathonCatalina Island | CA | 1:55:18 | #31 |
| 2019 | Richmond MarathonRichmond | VA | 2:00:06 | #551 |
| 2019 | National Watermelon Day RunHartford | WI | 2:05:59 | #41 |
| 2019 | Wisconsin Trail Assail National Watermelon RunHartford | WI | 2:05:59 | #41 |
| 2019 | Run Bentonville Half MarathonBentonvile | AR | 2:06:34 | #781 |
| 2019 | Run Bentonville Half MarathonBentonville | AR | 2:06:35 | #781 |
| 2019 | Folsom Blues BreakoutFolsom | CA | 2:34:25 | #514 |
| 2019 | Pittsburgh Marathon WeekendPittsburgh | PA | 2:52:24 | #10232 |
| 2018 | Chattanooga Marathon | — | 1:26:07 | #19 |
| 2018 | Wadsworth MatchStick Challenge Half MarathonWadsworth | OH | 1:33:48 | #3 |
| 2018 | MatchStick Challenge | — | 1:33:48 | #3 |
| 2018 | Georgetown to Idaho Springs Half MarathonUnknown | CO | 1:43:42 | #119 |
| 2018 | Georgetown to Idaho Springs Half Marathon | — | 1:43:42 | #119 |
| 2018 | Run SF "Golden Gate City" 5K/10K/13.1San Francisco | CA | 1:44:03 | #274 |
| 2018 | South Shore *3 Beach Minimum" Half Marathon 2026Hull | MA | 2:07:58 | #209 |
| 2018 | South Shore 3 Beach Minimum Half Marathon | — | 2:07:58 | #209 |
| 2018 | Run Bentonville Half MarathonBentonvile | AR | 2:33:57 | #1371 |
| 2018 | Run Bentonville Half MarathonBentonville | AR | 2:33:58 | #1371 |
| 2018 | B.A.A. Half MarathonBoston | MA | 3:08:41 | #6362 |
| 2017 | Drake Road RacesDes Moines | IA | 1:56:42 | #377 |
| 2017 | Dances With Dirt - Devil's LakeBaraboo | WI | 2:05:54 | #133 |
| 2017 | Maui Oceanfront MarathonLahaina | HI | 2:14:45 | #194 |
| 2017 | Jazz Half Marathon and 5KNew Orleans | LA | 2:23:54 | #926 |
| 2017 | Rock ‘n’ Roll Denver Marathon & 1/2 MarathonDenver | CO | 2:44:38 | #3984 |
| 2016 | Murfreesboro Half MarathonMurfreesboro | TN | 1:21:55 | #14 |
| 2016 | Oklahoma City Memorial MarathonOklahoma City | OK | 1:44:03 | #322 |
| 2016 | Boston's Run To RememberBoston | MA | 1:45:46 | #841 |
| 2016 | Drake RelaysDes Moines | IA | 1:55:37 | #335 |
| 2016 | Eugene Marathon 2024Eugene | OR | 2:07:58 | #1174 |
| 2015 | Just A Short RunAllison Park | PA | 0:28:10 | #34 |
| 2015 | Less Popular Brooklyn Half MarathonBrooklyn | NY | 1:35:53 | #1736 |
| 2015 | Publix Atlanta Marathon, Half Marathon & 5KAtlanta | GA | 1:43:16 | #382 |
| 2015 | Oklahoma City Memorial MarathonOklahoma City | OK | 1:47:53 | #523 |
| 2015 | Oklahoma City Memorial Marathon | — | 1:47:53 | #523 |
| 2015 | 18th Annual F^3 Lake Half Marathon & 5kChicago | IL | 1:52:53 | #504 |
| 2015 | Montgomery Half MarathonMontgomery | AL | 1:56:04 | #108 |
| 2015 | March Madness Half MarathonCary | IL | 1:56:52 | #580 |
| 2015 | Rocky Mountain Half Marathon & 5KEstes Park | CO | 2:09:10 | #358 |
| 2015 | South Shore *3 Beach Minimum" Half Marathon 2026Hull | MA | 2:15:37 | #216 |
| 2015 | South Shore 3 Beach Minimum | — | 2:15:37 | #216 |
| 2015 | Mayflower Brewing Half Marathon | — | 2:19:20 | #1189 |
| 2015 | Flying Pig Pump and RunCincinnati | OH | 2:41:24 | #8013 |
| 2015 | B.A.A. Half MarathonBoston | MA | 3:04:39 | #6296 |
| 2014 | Rock 'n' Roll Las VegasLas Vegas | NV | 1:35:03 | #329 |
| 2014 | Santa Barbara Half Marathon & 5KSanta Barbara | CA | 1:55:59 | #539 |
| 2014 | Surftown Half, 2-Person Relay & 5KWesterly | RI | 2:02:58 | #726 |
| 2014 | St. Jude Memphis Marathon WeekendMemphis | TN | 2:09:06 | #1876 |
| 2014 | Rock 'n' Roll Chicago Half MarathonChicago | IL | 2:35:07 | #10035 |
| 2014 | Newport MarathonNewport | RI | 2:56:32 | #2682 |
| 2013 | Borgess Run For The Health Of It!Kalamazoo | MI | 1:29:19 | #34 |
| 2013 | Oklahoma City Memorial MarathonOklahoma City | OK | 1:48:49 | #628 |
| 2013 | Philadelphia MarathonPhiladelphia | PA | 1:50:03 | #1946 |
| 2013 | Kaiser Permanente Colfax MarathonDenver | CO | 1:50:57 | #736 |
| 2013 | Kaiser Permanente Colfax Marathon | — | 1:50:57 | #737 |
| 2013 | AmeriHealth Atlantic City Marathon, Half Marathon, 10K & G. Larry James 5KAtlantic City | NJ | 1:52:54 | #249 |
| 2013 | First Energy Akron MarathonAkron | OH | 1:57:51 | #1179 |
| 2013 | Air Force MarathonDayton | OH | 2:07:15 | #1548 |
| 2013 | Monster DashMinneapolis | MN | 2:16:02 | #3779 |
| 2013 | Brewers Mini Marathonmilwaukee | WI | 2:20:51 | #2837 |
| 2013 | InFirst Bank Veteran's Marathon, Half Marathon, and Marathon RelayBlairsville | PA | 2:21:05 | #127 |
| 2013 | Pittsburgh Marathon WeekendPittsburgh | PA | 2:30:38 | #10553 |
| 2013 | Seattle Marathon: Summer EventsSeattle | WA | 2:44:48 | #5040 |
| 2012 | Quincy 1/2 Marathon & 5k Road Race | — | 1:37:23 | #189 |
| 2012 | Oklahoma City Memorial MarathonOklahoma City | OK | 1:43:55 | #225 |
| 2012 | Oklahoma City Memorial Marathon | — | 1:43:55 | #225 |
| 2012 | Carlsbad MarathonCarlsbad | CA | 1:45:14 | #790 |
| 2012 | Tri-City Medical Center Carlsbad Marathon | — | 1:45:14 | #789 |
| 2012 | Philadelphia MarathonPhiladelphia | PA | 1:45:58 | #1191 |
| 2012 | Eversource Hartford Marathon, Half Marathon, Relay & Charity 5KHartford | CT | 1:46:08 | #939 |
| 2012 | Ing Hartford Marathon, Half Marathon And 5k | — | 1:46:08 | #936 |
| 2012 | Rock ‘n' Roll Washington DCWashington | DC | 1:52:57 | #2767 |
| 2012 | Rockfest Half MarathonHampton Beach | NH | 1:53:50 | #848 |
| 2012 | Publix Atlanta Marathon, Half Marathon & 5KAtlanta | GA | 1:57:16 | #2019 |
| 2012 | Buffalo Marathon WeekendBuffalo | NY | 2:00:37 | #1009 |
| 2012 | Dances With Dirt - Devil's LakeBaraboo | WI | 2:26:24 | #181 |
| 2012 | Pittsburgh Marathon WeekendPittsburgh | PA | 2:34:51 | #8977 |
| 2012 | Mount Lemmon Marathon and Half MarathonTucson | AZ | 3:52:45 | #140 |
| 2011 | Xterra Boney Mountain Trail RunMalibu | CA | 1:50:39 | #16 |
| 2011 | 2nd Annual Half Of Quincy | — | 1:52:33 | #618 |
| 2011 | Rockfest Half MarathonHampton Beach | NH | 1:56:32 | #517 |
| 2011 | Pittsburgh Marathon WeekendPittsburgh | PA | 2:29:38 | #6432 |
| 2010 | Shamrock'n Half MarathonSacramento | CA | 1:38:08 | #237 |
| 2010 | Los Angeles County Half Marathon | — | 1:40:28 | #119 |
| 2010 | Tri-City Medical Center Carlsbad Marathon | — | 1:53:13 | #1449 |
| 2010 | Minneapolis Marathon | — | 2:07:01 | #1426 |
| 2010 | Pittsburgh Marathon WeekendPittsburgh | PA | 2:26:21 | #5155 |
| 2009 | Shamrock'n Half MarathonSacramento | CA | 1:33:53 | #151 |
| 2009 | Rock 'n' Roll Arizona MarathonPhoenix | AZ | 1:35:15 | #429 |
| 2009 | Sunrise Marathon 5K/10K/13.1 SAN FRANCISCOSan Francisco | CA | 1:38:44 | #189 |
| 2009 | Xterra Boney Mountain Trail RunMalibu | CA | 1:46:15 | #10 |
| 2009 | Publix Atlanta Marathon, Half Marathon & 5KAtlanta | GA | 1:49:26 | #1343 |
| 2009 | Eau Claire MarathonEau Claire | WI | 1:59:42 | #387 |
| 2009 | Carlsbad MarathonCarlsbad | CA | 2:09:57 | #3815 |
| 2008 | Dole Great Race of Agoura HillsAgoura Hills | CA | 1:28:35 | #13 |
| 2008 | Sunrise Marathon 5K/10K/13.1 SAN FRANCISCOSan Francisco | CA | 1:40:09 | #229 |
| 2008 | Publix Atlanta Marathon, Half Marathon & 5KAtlanta | GA | 1:49:23 | #1173 |
| 2008 | Xterra Boney Mountain Trail RunMalibu | CA | 1:54:59 | #14 |
| 2008 | Rock 'n' Roll NashvilleNashville | TN | 2:07:56 | #6931 |
| 2007 | Rock 'n' Roll Los Angeles Half MarathonLos Angeles | CA | 1:26:35 | #61 |
| 2007 | Dole Great Race of Agoura HillsAgoura Hills | CA | 1:31:19 | #17 |
| 2007 | Rock 'n' Roll NashvilleNashville | TN | 2:22:36 | #9675 |
| 2006 | Rock 'n' Roll Los Angeles Half MarathonLos Angeles | CA | 1:25:34 | #36 |
| 2006 | 2026 Disneyland® Half Marathon Weekend presented by HONDAAnaheim | CA | 1:26:22 | #37 |
| 2006 | Dole Great Race of Agoura HillsAgoura Hills | CA | 1:33:45 | #15 |
| 2006 | B.A.A. Half MarathonBoston | MA | 1:46:25 | #863 |
| 2006 | Jack & Jill Marathon & HalfNorth Bend | WA | 1:49:33 | #381 |
| 2006 | Philadelphia MarathonPhiladelphia | PA | 2:06:30 | #1162 |
| 2005 | Flying Pig Marathon | — | 1:59:44 | #928 |
| 2005 | Rock 'n' Roll NashvilleNashville | TN | 2:13:55 | #5301 |
| 2004 | Dole Great Race of Agoura HillsAgoura Hills | CA | 1:41:16 | #43 |
| 2004 | Jacksonville Bank Marathon, Half MarathonJacksonville | FL | 1:41:40 | #129 |
| 2004 | New Bedford Half MarathonNew Bedford | MA | 1:44:55 | #717 |
| 2004 | Rock 'n' Roll Arizona MarathonPhoenix | AZ | 2:34:13 | #8876 |
| 2003 | New Bedford Half MarathonNew Bedford | MA | 1:42:52 | #471 |
| 2003 | Run SF "Golden Gate City" 5K/10K/13.1San Francisco | CA | 1:48:45 | #316 |
| 2002 | Beer City Half™ San DiegoSan Diego | CA | 1:29:33 | #208 |
| 2001 | Bakersfield MarathonBakersfield | CA | 1:26:25 | #14 |
| 2001 | Beer City Half™ San DiegoSan Diego | CA | 1:30:43 | #184 |
| 2001 | Hyannis MarathonHyannis | MA | 1:37:54 | #105 |
| 2001 | Fairfield Road RacesFairfield | CT | 2:03:43 | #1171 |
| 1999 | Hyannis MarathonHyannis | MA | 1:35:43 | #71 |
| 1998 | Hyannis MarathonHyannis | MA | 1:35:32 | #90 |
| 1998 | New Bedford Half MarathonNew Bedford | MA | 1:36:24 | #293 |
States Raced
1 race 2 races 3-4 races 5+ races
State Breakdown
CACalifornia
31 racesMAMassachusetts
15 racesPAPennsylvania
11 racesWIWisconsin
7 racesGAGeorgia
6 racesNCNorth Carolina
6 racesOHOhio
6 racesOKOklahoma
5 racesTNTennessee
5 racesARArkansas
4 racesAZArizona
4 racesCOColorado
4 racesILIllinois
4 racesVAVirginia
4 racesMDMaryland
3 racesNYNew York
3 racesCTConnecticut
2 racesIAIowa
2 racesMIMichigan
2 racesOROregon
2 racesWAWashington
2 racesALAlabama
1 raceLALouisiana
1 raceNVNevada
1 raceTXTexas
1 race50-State Challenge
25/ 50 states
25 states to go