A Cubs trainer went to the mound after Silva issued a one-out walk to Jonathan Herrera, the second batter in the Rockies' lineup. Silva remained in Sunday's game and allowed a single to Carlos Gonzalez and a ground-rule RBI double to Troy Tulowitzki.
Acting manager Alan Trammell and the trainer went back out to the mound and Silva was replaced by left-hander James Russell.
Silva allowed two runs in one-third of an inning, his shortest start of the season.
Copyright 2010 by The Associated Press
Rehabbing Chicago Cub Carlos Zambrano threw two scoreless innings in IowaSilva concentrating on World Cup
