Right-hander Roy Oswalt is retiring after 13 major league seasons.
Oswalt's agent, Bob Garber, confirmed Oswalt's retirement Tuesday and said the pitcher would come to work for his agency.
Oswalt, 36, had a 163-102 career record with a 3.36 ERA. His best season came with Houston in 2004, when he went 20-10 with a 3.49 ERA. The durable righty — a three-time All-Star and 2006 NL championship series MVP — went over 200 innings seven times in his career but dealt with injuries in recent years.
He was 0-6 with an 8.63 ERA in nine outings and six starts for Colorado last year. He signed a minor league deal with the Rockies in May 2013 and missed time with a strained left hamstring.
A 23rd-round pick by Houston in the 1996 amateur draft, Oswalt pitched his first nine-plus seasons for the Astros and then played for Philadelphia, Texas and the Rockies.
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AP Sports Writer Ronald Blum contributed to this report.