The Philadelphia Phillies announced that Martinez will make his first start of the season on Wednesday at Wrigley Field against the Chicago Cubs. Manager Charlie Manuel informed Moyer on Monday that he will move to the bullpen.
Martinez, 37, last pitched for the New York Mets in 2008, going 5-6 with a 5.61 ERA in 20 starts before injuries put him on the shelf. The Phillies signed him on July 15 and immediately put him on the disabled list with a shoulder strain.
In three rehabilitation starts in the minor leagues, Martinez went 1-1 with a 5.11 ERA.
"Based on our reports on how Pedro has pitched in his rehab starts, we felt it was time to move him into our rotation," Manuel said. "Jamie was a total professional and team player when we let him know of the decision to move him to the bullpen. He has been and will continue to be a very important part of this team."
Martinez has won three Cy Young Awards but has fallen on hard times in recent years, mostly due to shoulder problems. He hasn't had double digit wins since 2005 (15-8), his first with New York. In 17 seasons with the Dodgers, Expos, Red Sox and Mets, Martinez has a 214-99 record with a 2.91 ERA and 3,117 strikeouts.
Moyer is 10-9 this season with a 5.47 ERA.