Whisenhunt (back) will throw a bullpen session Monday, Shayna Rubin of the San Francisco Chronicle reports.

EDGE Analysis

It appears to be the first time Whisenhunt has thrown from the bump since he landed on the 15-day injured list at the end of August with a back strain. Whisenhunt is eligible for activation this weekend, and it's possible he'll return then if the Giants don't think he needs a rehab start.