Pittsburgh reinstated Sisk (elbow) from the 15-day injured list Wednesday.
Sisk was on the shelf for about a month due to left elbow inflammation before getting the green light to rejoin the Pirates after making two rehab appearances at Triple-A Indianapolis last weekend. The Pirates optioned right-hander Wilber Dotel to Triple-A to make room on the active roster for Sisk, who owns a 2.23 ERA, 1.18 WHIP and 43:13 K:BB over 36.1 innings with Pittsburgh this season.