Acquired: February 18, 1999 - The Yankees acquired Roger from the Toronto Blue Jays in return for second baseman Homer Bush, lefty reliever Graeme Lloyd and lefty starting pitcher David Wells.
Signed: May 6, 2007 - Four years after his initial retirement and after several more retirements, Roger returned to the Yankees by signing as a "mercenary" free agent. He had done this the year before as well, sitting out spring training, then signing after the start of the season with a team he felt had a good chance at winning and that he believed he could help. In 2006, he signed with Houston at the end of May and had a pretty good season. His return to the Yankees was not as successful as Roger ran out of gas down the stretch and was a shell of his former dominant self. From August on, he pitched to a 3-1 record in seven starts, but had a bloated 4.67 ERA and batters hit a robust .285 off of him. It would turn out to be his final season at age 44.
Bill N. from Cambridge, MA says that Roger answered his question of why Clemens switched from #12 to #22 in 1999 by saying it was because of Roger's son Koby. Former NFL running back Emmitt Smith was Koby's favorite player and wore #22 throughout his career. A N.Y. Times article by William Rhoden on July 26, 1999 stated:
"As it turns out, Clemens carried the secret to his breakout on his back: a new number. Before yesterday's game, Clemens decided to change his uniform number from 12 to 22. The move was spearheaded by his 12-year-old son, Koby, who wears No. 22 in Houston's Select League.
''We've been talking about it for some time, and he had a really good summer baseball season this year,'' Clemens said. ''So I told him I'd do it.''
Clemens made sure no one else had the uniform -- ''I thought for sure someone had it in spring training'' -- and made the switch, much to his son's delight. ''He's pretty fired up about it,'' Clemens said."