Duffy (Achilles) had an MRI on Monday, Andrew Baggarly of the Bay Area News Group reports.
Duffy isn't expected to be available for Monday's game against the Pirates in any capacity. However, based off past experience with soreness in his Achilles heel, it isn't believed that Duffy will miss more than a few games and simply needs the time to rest. Ramiro Pena will likely get the nod and start at third base during Duffy's absence.