Here's a look back at Roger Clemens' previous stint with a Houston-area ballclub.
Roger Clemens came out to retirement to sign a one-year contract with the Houston Astros on January 12, 2004.
Roger Clemens was a hit during his first season with the Astros in 2004, going 18-4, starting for the National League in the MLB All-Star Game, winning his seventh Cy Young Award and helping the ballclub reach the NL Championship Series.
Roger Clemens returned to the Astros in 2005 on another one-year contract, going 13-8 with a career-best 1.87 ERA.
Roger Clemens of the Houston Astros pitches during the fifth inning of the 2005 MLB All-Star Game at Comerica Park in Detroit on July 12, 2005.
Astros pitcher Roger Clemens, right, pours champagne on team owner Drayton McLane as they celebrate the Astros' 6-4 victory over the Chicago Cubs to earn a wildcard playoff berth Oct. 2, 2005 at Minute Maid Park.
Roger Clemens is doused with champagne by Jose Vizcaino in the clubhouse after the Astros' win 7-6 victory in the 18th inning of Game 4 of the National League Division Series between the Astros and the Atlanta Braves,.
Craig Biggio and Roger Clemens speak to thousands of screaming fans Friday morning, Oct. 21, 2005 on the south side of Minute Maid Park in a City of Houston sponsored sendoff before the team left for their flight to Chicago, where they would take on the White Sox in their first World Series appearance.
Roger Clemens started Game 1 of the 2005 World Series against the Chicago White Sox.
Roger Clemens and Craig Biggio were in attendance as the Astros were recognized prior to the Texans' game against the Cleveland Browns on Oct. 30, 2005.
Roger Clemens waves to the crowd while holding his National League championship ring box with Astros owner Drayton McLane in the background during the ring ceremony.
Roger Clemens talks to the media during a press conference announcing his return to Astros on May 31,2006.
Roger Clemens pitches in the first inning during a Corpus Christi Hooks-San Antonio Missions minor league baseball game at Whataburger Field in Corpus Christi on June 11, 2006.
Clemens started the game in preparation for his return to the Astros.
Roger Clemens stands on the mound with Logan Fischer, 10, one of the baseball buddies from the Round Rock Select Cougar team during the National Anthem before the Round Rock Express-New Orleans Zephyrs minor league game at Dell Diamond in Round Rock on June 16, 2006.
Roger Clemens started the game in preparation for his return to the Astros.
Roger Clemens waves to the crowd as he leaves a game against Cincinnati Reds during the seventh inning on Sept. 20, 2006 at Minute Maid Park.
Clemens, who pitched six innings in the last regular scheduled home start of his Astros career, finished the year with a 7-6 record and 2.30 ERA.