Cahill (knee) is being stretched out while on a rehab assignment with Triple-A Iowa, and could be an option to get a spot start with the big league club when a sixth starter is needed next week.

EDGE Analysis

The Cubs need a sixth starter due to a doubleheader on Aug. 16, so the fact that Cahill has thrown between three and four innings in each of his last four rehab appearances makes him a strong candidate to get that start. Chicago doesn't have a lot of big-league ready starting pitching depth, especially after trading Adam Warren back to the Yankees, so the fact that Cahill is on the 40-man roster and will be stretched out enough to start next week makes him a likely option. The Cubs will need to activate Cahill by Aug. 17, as he began his rehab assignment on July 18, so he could start against the Brewers, either as part of next Tuesday's doubleheader or next Wednesday. He has a 3.97 ERA, 1.92 WHIP and 21:11 K:BB in 17.2 innings across five appearances in the Pacific Coast League during this rehab stint.