Draft: Taken in the 26th round of the 2002 draft by the San Francisco Giants.
Summer 2002: Played for the Anchorage Bucs in the Alaska Baseball League ... Went 1-1 with a 2.00 ERA in five starts ... Struck out 18 and walked just two, one intentionally, in 27 innings pitched ... Combined with Nevada's Bryan Johnson for a shutout during in the season.
Arizona 2002: Led the starting staff with a career-high in innings pitched (117.0) ... Tallied a team-high seven wins ... Tossed his second complete game of the season against UC Riverside (4/19). Gave up just one run on six hits while striking out eight and walking only one for his team-leading seventh win of the season ... Won his team-leading sixth game of the season with seven strong innings at Cal (4/12) in which he gave up just two runs on five hits. Struck out three and walked none ... Tossed eight innings of five-hit ball in a no-decision effort against Stanford (4/5) ... Helped snap UA's six game road losing streak with seven innings of work at Oregon State (3/28) ... Did not earn a decision in UA's 9-7 loss to UNC Wilmington (3/15) ... Suffered his second loss of the season with no run support at Long Beach State (3/8). Worked seven innings and allowed just four runs on 11 hits ... Scattered four hits over eight innings while striking out a career-high 10 hitters in fourth win of the season against CSUDH (3/2)... Was hit on the right forearm during his start against Irvine, was removed for precautionary reasons, but did not miss any starts ... Strung together 17 scoreless innings pitched over three starts ... Tossed Arizona's first complete-game shutout in nearly four years in UA's 1-0 win over San Diego State (2/7). Struck out a then-career-high nine hitters and walked none while allowing only five hits to win his third game of the season ... Combined with two relievers in a 3-0 shutout of Utah (2/1), tossing six innings with four K's ... Went eight innings in Arizona's season opener against New Mexico (1/25), struck out four and walked none ... Saw his seven game winning streak (four in 2001, three this season) come to an end at Texas A&M (2/15). Tossed seven innings with two K's and no walks in Arizona's 4-0 shutout loss.
Arizona 2001: Wildcats' opening day starter... Had a team-high 3-to-1 strikeout- to-walk ratio ... Went 3-0 in his final three starts of the season tallying nine strikeouts and a 1.98 ERA against Washington, at Stanford and Arizona State ... Tossed eight innings in final start of the season against Washington (5/19). Struck out five Huskies for his seventh win of the year ... Followed an impressive showing in victory at Arizona State with seven inning effort to earn a win over the seventh-ranked Stanford Cardinal (5/12) in Palo Alto, Calif. Scattered eight hits, allowed only two runs, struck out one and walked none for his sixth victory of the season ... Was impressive over 7.2 innings in victory at Arizona State (4/28) (7 H, 1 ER, 1 BB, 3 K) ... Earned his second consecutive victory (third overall) with five innings of work against Southern Utah (3/17) ... Won second game of the season with a seven inning effort at UCLA (3/10) ... Struck out a career-high tying eight hitters in no decision appearance against Utah (2/24) ... Tossed eight innings of five hit ball against New Mexico (2/9) striking out eight, walking none ... Pitched 4.1 innings in Arizona debut against Hawaii-Hilo (1/18) giving up only one earned run.
High School: Graduated from Chaparral High School where he played for Coach Jerry Dawson ... Earned four varsity letters as a pitcher and first baseman... Team won two state titles... Two-time Scottsdale Pitcher of the Year... First-team all-state... Recorded 32 wins in four year career including back-to-back 11-win seasons his junior and senior year.
Personal: Full name: Sean Michael Rierson... Born: 2/13/81 in Phoenix, Ariz... Nickname: Seaner... Undecided in major... Lists cars and golf among his hobbies ... Lists being a member of `99 USA Junior Olympics team that won the gold medal in Taiwan as one of his most memorable experiences in baseball ... Son of Robert and Bernice Rierson.