Graduated from Ozark (MO) High School in 2004 and was named First-Team All-State that season after going 10-1 with a 1.09 ERA...he lead his school to the Class 3 State Championship in 2004 and was named to Street and Smith's Preseason High School All-American team…also lettered in basketball. Selected by Chicago (AL) in the fourth round of the June 2004 draft...signed by White Sox scouts Nathan Durst and Alex Slattery. Originally added to a Major League 40-man roster prior to the 2008 season while with Chicago...has used all of his option years. Signed to a one-year contract that runs through the 2014 season.
Made 14 relief appearances and 22 starts for Houston...in 11 of his 22 starts, allowed two-or-fewer runs and posted a 5.98 ERA (76ER/114.1IP) as a starter ... posted a 5.49 ERA (24ER/39.1IP) as a reliever ... despite spending half of the season as a reliever, tossed 153.2 innings, which tied for the club lead (also, Keuchel) ... was one of eight players, and one of four pitchers (also, Cruz, Norris, Wright) to appear on both the Astros 2012 and 2013 Opening Day rosters ... finished seventh in the AL with a 1.93 ground ball to fly ball ratio (min. 150 IP) ... allowed 11 unearned runs, which ranked tied for second in the AL and tied for fourth in the Majors... induced 23 double play balls, which ranked fifth in the AL and tied for eighth in the Majors...was one of two Astros pitchers to stay on the active roster for the entire season (also, Bedard)...had two sub-4.00 ERA months, in April (3-2, 3.60) and June while making six starts in each month ... posted a career-high, threegame winning streak in three straight starts from April 19-29...had his best month of the season in June, going 1-2 with a 3.22 ERA (13ER / 36.1IP) and 29 strikeouts (four quality starts) ... began the year as the Astros No. 2 starter and started his first 19 games ... allowed nine runs (seven earned) on July 5 at TEX before being moved to the bullpen...14 of his last 17 games all came in relief, and those three starts in that span were all spot starts ... pitched 5.0 innings of relief on Sept. 16 vs. CIN...marked the second-longest relief appearance by an Astro this season (Clemens, 5.1IP) and the longest of his career.
Led the Astros in wins, innings pitched and starts...was the club's most consistent starting pitcher...went 5.0-or-more innings in all but one of his 32 starts...ranked second in the Majors in IP by a rookie...rankedsecond among NL rookies in strikeouts and wins...was the only NL rookie to toss a CG shutout (June 27 vs.SD)...his 2.34 ERA (21ER/80.2IP) at home ranked fifth in the NL (min. 75 IP), and fourth in Astros history for arookie (min. 10 starts)...ranked fifth in the Majors and third in the NL with a mark of 0.60 home runs allowedper 9.0 innings (13HR/193.2IP)...ranked third in the Majors with a 2.44 GB/FB ratio...posted the fifth highestGB/FB ratio all-time for a rookie in a single season since 1990...posted the third-highest innings pitched totaland the fourth-highest strikeout total by an Astros rookie in franchise history for a single season...becameone of just eight Astros rookies all-time to record double-digit wins...joined a select group with Robertson(2003-15W), Oswalt (2001-14W), Deshaies (1986-12W), Griffin (1969-11W), Kerfeld (1986-11W), Rodriguez(2005-10W) and Wilson (1967-10W)... tossed 7.0 shutout innings, allowing three hits without issuing a walkin his season debut on April 7, in what was the Astros' second game of the year...according to Elias, becamethe first Astros hurler to go at least 7.0 innings without allowing a run or walk in his season debut since LHPBob Knepper on April 10, 1986...hurled the Astros' first complete game shutout of the season on June 27 vs.SD....allowed six hits and struck out seven in what was his first-career CG SHO...became the first rookie pitcherto throw a complete game shutout for Houston since RHP Taylor Buchholz on May 21, 2006 vs. TEX...recordedhis 10th win of the year on Aug. 14...became the first MLB rookie to earn 10 wins before his team won 40games since LHP Jeff Francis did so in 2005 (Elias)...from July 14-Aug. 14, limited his opponent to two runs orless in each of his seven outings, a streak that had not been accomplished by an Astro since Wandy Rodriguezwent seven straight from July 2-Aug. 9, 2009...Harrell held his opponent to two runs or fewer in 16 of his 32total starts...over his final 18 starts, posted a mark of 8.0 strikeouts per 9.0 innings (100SO/112IP)...improvedupon his mark of 5.0 SO/9IP (49SO/88.2IP) over his first 15 starts...gave up just five homers over those final 18starts...capped off the season with 6.0 shutout innings at CHC on Oct. 1.
Made six appearances for Houston, including two starts, as a September call-up and went 0-2 with a 3.46 ERA (5ER/13IP)in those outings...was 0-2 with a 4.50 combined ERA during his time with the Astros and White Sox (3g) this season...beganthe year with Triple A Charlotte in Chicago's (AL) organization...made two appearances on the White Sox roster before beingclaimed off waivers by Houston on July 8; assigned to Triple A OKC...recalled by the Astros on Sept. 2...made his Astros debut ina start on Sept. 2 vs. MIL (0ER/5.1IP)...was the first starter to throw 5.1-or-more shutout innings in his Astros debut since LHP J.A.Happ threw 6.0 shutout innings in his debut on July 30, 2010 vs. MIL...made four relief appearances as an Astro, going 0-1 witha 3.86 ERA (2ER/4.2IP)...made his second start of the season on Sept. 25 vs. COL (3ER/3IP)...combined to go 12-5 with a 2.63 ERA(37ER/126.2IP) in 22 games (21 starts) at the Triple A level this season...at OKC, went 5-2 with a 1.72 ERA (10ER/52.1IP) in 9 starts.
Spent the majority of the season with Class AAA Charlotte, but made eight appearances (three starts)with the White Sox, going 1-0 with a 4.88 ERA (13 ER/24.0 IP)...went 1-0 with a 6.28 ERA (10 ER/14.1 IP) asa starter and posted a 2.79 ERA (3 ER/9.2 IP) as a reliever with the Sox...was recalled from Charlotte on 7/30and made his major-league debut the same night in a start vs. Oakland, earning his first win (1 ER/6.0 IP) ...became the first Sox starter to be victorious in his debut since Kip Wells on 8/2/99 at Detroit...was optioned backto the Knights following the start and was recalled on 8/25 for the remainder of the season...was 10-10 with a4.58 ERA (70 ER/137.2 IP) over 26 starts with Charlotte...compiled a five-game winning streak from 6/4-6/24,going 5-0 with a 2.03 ERA (7 ER/31.0 IP)...was 4-2 with a 4.37 ERA (23 ER/47.1 IP) over his final eight startswith the Knights before his final promotion.
Went 12-4 with a 3.27 ERA (53 er/146.0 IP) in 25 starts between Class AA Birmingham and ClassAAA Charlotte...began the season with the Barons and was 8-3 with a 3.25 era (29 er/80.1 IP) in 14 starts...was tied for the Southern league lead in wins at the time of his promotion to Charlotte on 6/25...went 4-1 with a 3.29 era (24 er/65.2 IP) with the Knights...was on the disabled list from 8/7-14 with a strained right calf...was a member of the gold-medal winning Team USA at the IBAF Baseball world cup in Italy...went 3-0 with a 0.00 ERA (10.0 IP) and two hits allowed in three relief appearances in the international tournament.
combined to go 4-4 with a 3.82 era (29 er/68.1 ip) in 15 games (14 starts) between class aa Birmingham,advanced rookie Bristol and class a Kannapolis ... missed nearly half of the season with a strainedright shoulder (4/19-6/23) ... made three starts with the Barons before suffering the injury ... pitched with Bristolin a rehab start on 6/17 vs. Johnson city before his reinstatement with Kannapolis on 6/23 ... was 1-1 with a5.91 era (7 er/10.2 ip) with the intimidators before his transfer back to Birmingham on 7/5 ... posted a 2.94ERA (11 ER/33.2 IP) in his fi nal six starts with the Barons ... went 3-1 with a 6.86 ERA (15 ER/19.2 IP) in eightgames (seven starts) with peoria of the arizona fall league.
Was ranked by Baseball America as the No. 8 Prospect in the White Sox organization prior to the season...missed the entireseason after undergoing surgery on his right shoulder (debridement and posterior capsule release in Jan...the procedurewas performed by Dr. Charles Bush-Joseph and Dr. Nik Verma...participated in the White Sox Instructional League followingthe season
Was 7-4 with a 3.20 ERA (36ER/101.1IP) in 20 combined starts between Class A Winston-Salem andBirmingham...was named to the Carolina League mid/postseason All-Star teams, going 7-2 with a 2.45 ERA (25ER/91.2IP)in 17 starts with the Warthogs...was 0-2 with a 10.24 ERA (11 ER/9.2 IP) in three starts with the Barons...was placed on thedisabled list on Aug. 15 with a strained right shoulder and missed the remainder of the season
Led Kannapolis instarts (26) in his first season with the Intimidators...also ranked second in IP (133.1) and ERA (3.65) and third in strikeouts (85)...ranked seventh among Sox farmhands in ERA and IP..
Made pro debut at Advanced Rookie Bristol, going 3-5 with a 5.59ERA (30ER/48.1IP) in 13 games (nine starts)