Because now they are forced to use Glendon Rusch as a starter! Over the last two years 142 pitchers have started at least 20 games in the majors. Rusch ranks 8th in ERA (3.23) among those pitchers, considering only their statistics as a starter. His record is 6-3, but more importantly the team record is 13-8 in his 21 starts, including a 4-1 mark this year. Here's the top ten two-year ERAs among starters:
Jake Peavy 2.30
Roger Clemens 2.54
Ben Sheets 2.81
Carlos Zambrano 2.87
Johan Santana 2.88
Randy Johnson 2.91
Brad Penny 3.15
Glendon Rusch 3.23
Carl Pavano 3.26
Tim Hudson 3.38