Howell attended Jesuit High SchoolinSacramento, California where he was a four-year varsity letterwinner. In his senior season, he was 10–0 with a 0.09 ERA and 137 strikeouts, earning California Player of the Year, Sacramento Player of the Year and all-city honors in 2001, as well as being named a first-team All-American by USA Today.[2] He set a sectional playoff record with 47 strikeouts in 22 innings in 2000 as a junior and played in various international tournaments, including winning silver medals at the 2001 Junior Pan American Games, the 2000 International Baseball Association Foundation Games and the 1998 and 1999 AAU National Championships.[3]
Howell made his Major League Baseball debut with the Royals on June 11, 2005. He started the game against the Arizona Diamondbacks and allowed one run in five innings, with eight strikeouts, to record the win.[13] Diamondbacks outfielder Luis Gonzalez said of Howell, "We didn't have much of anything on him going in. It was like walking down a dark alley."[14] He made a total of 15 starts for the Royals in 2005 and was 3-5 with a 6.19 ERA.[11] He began 2006 back with Omaha, where he was 3–2 with a 4.75 ERA in eight starts,[12] missing the month of May as a result of shoulder stiffness.[15]
Howell was assigned to the Triple-A Durham Bulls, where he made ten starts and was 5–3 with a 2.62 ERA.[12] He made his Devil Rays debut on August 1, 2006 against the Detroit Tigers, allowing six runs in only 32⁄3 innings.[17] He started eight games for the Devil Rays and was 1–3 with a 5.10 ERA.[11] He split the 2007 season between the Devil Rays and the Bulls. In the minors, he was 7–8 with a 3.38 ERA in 21 starts[12] and started game one of the International League championship series.[18] In the majors, he started ten games and was 1–6 with a 7.59 ERA.[11]
In 2008, the Rays decided to move him out of the starting rotation and into the bullpen, a change which led to an increase in velocity on his pitches and a better break on his breaking balls.[19] He went 6-1 with a 2.22 ERA in 64 games, striking out 92 batters while earning three saves.[11] He also pitched in the 2008 World Series, in which he took the loss in the deciding game five against the Philadelphia Phillies.[20]
Howell became the Rays closer in June 2009 after an injury to Troy Percival. He converted his first ten save opportunities and had a 1.64 ERA in 22 innings but after Ryan Langerhans of the Seattle Mariners hit a two-run homer off him on August 7 he blew three straight save opportunities. "Terrible feeling" he told the press.[21] He rebounded and finished the season with a 7–5 record and a 2.84 ERA in 69 games with 17 saves.[11]
In 2010, Howell suffered from what was reported as "weakness" in his left shoulder during spring training, causing him to begin the season on the disabled list.[22] He threw in a simulated game on May 17, but stopped after only twelve pitches, still experiencing discomfort in his shoulder.[23] A few days later he underwent surgery on the shoulder to repair a torn labrum, causing him to miss the entire 2010 season.[24]
Howell was expected to miss the start of the following season as well[25] and was non-tendered by the Rays on December 10, 2010, to avoid arbitration.[26] He was re-signed on December 13 to a one-year, $1.1 million, deal with the Rays.[27]
Howell rejoined the Rays roster on May 20, 2011,[28] and pitched in 46 games in 2011, with a 6.16 ERA.[11] In 2012, he signed another one-year contract with the Rays, for $1.35 million,[29] and pitched in 55 games with a 3.04 ERA.[11]
On January 4, 2013, Howell agreed to a one-year, $2.85 million contract with the Los Angeles Dodgers.[30] He was a key part of the Dodgers bullpen, appearing in 67 games with a 4-1 record and 2.03 ERA.[11] After the season, he re-signed with the Dodgers on a two-year, $11.25 million, contract that contained a third-year option.[31] He had a 2.39 ERA in 68 appearances for the team in 2014.[11] In the 2015 season, he was 6–1 with a 1.43 ERA in 65 appearances.[32] After the season, Howell exercised his $6.25 million player option for 2016.[33] He was not as effective in 2016, as he had a 4.09 ERA in 64 appearances out of the bullpen.[34] He became a free agent following the season.
On February 9, 2017, Howell signed a one-year, $3 million contract with the Toronto Blue Jays.[35][36] On August 16, Howell was designated for assignment.[37] He was released on August 20.[38]
On May 29, 2018, Howell signed with the San Rafael Pacifics of the Pacific Association. He became a free agent following the season. In 3 starts 10 innings he went 0-1 with a 3.60 ERA and 14 strikeouts.
Howell is a soft tosser. He throws his sinker in the mid 80's, topping out at 90 MPH. He also throws a knuckle-curve that has been described by scouts as "heavy" because of its extremely sharp downward break, and some even classify it as a slider.[39] He throws a change-up that breaks away from right-handed hitters. Howell has solid command of all three pitches.[40]
In 2009, he married Heather Hennessy, whom he met at USC,[41] a former USC 800 meter runner and Fox Sports reporter[41] who is a member of the Los Gatos High School Athletic Hall of Fame.[42] The couple founded Discover Your Path Foundation to reach out to kids together.[43] In 2011, Heather Hennessy-Howell published a children's book, 'The Adventures of Dangles' with an anti-bullying theme.[44] In August 2016, his wife filed for divorce, citing irreconcilable differences, listing their date of separation as August 8.[45]
