Roger Clemens has been compared to Nolan Ryan for most of his career.
Clemens has 321 wins, two behind Ryan and Don Sutton for 12th place on the career list.
Clemens, a six-time AL Cy Young Award winner, began the season with a 9-0 record, but has faltered of late. He is 2-3 with a 4.03 ERA in eight starts since June 8.
Clemens did not receive a decision after yielding a season high-tying three homers in a 7-6 loss to The Milwaukee Brewers on Friday. The hard-throwing right-hander gave up five runs and eight hits in 5 2-3 innings.
“I was grinding. That’s the word we use right now,” said Clemens, who has 133 strikeouts and a 2.85 ERA.
Arizona was beaten badly again after snapping a franchise-record 14-game losing streak in the series opener.
Fossum, a key component in the trade that sent Curt Schilling to the Red Sox over the winter, has failed to live up to expectations. He has lost his last three decisions, falling to 2-9 with a 6.17 ERA.
The left-hander is 1-6 with a 5.53 ERA in eight road starts this year.