Tropeano scratched from Saturday start vs. Bucs

Right-hander to miss game with undisclosed ailment; Chacin steps in

Tropeano scratched from Saturday start vs. Bucs

PITTSBURGH -- The Angels have scratched Nick Tropeano from his scheduled Saturday start at PNC Park because of an undisclosed ailment. The team said it will provide additional information after Tropeano undergoes further evaluation.

Jhoulys Chacin will take Tropeano's place, starting on normal rest thanks to a scheduled day off on Thursday. The Angels were still unsure whether Tropeano would require a stint on the 15-day disabled list as of late Friday night, moments after their 9-2 win over the Pirates in the series opener.

Tropeano's spot in the rotation would come up again on Tuesday.

Chacin fans 10 in complete game

Aside from Tropeano, the Angels have four injured starters, including Garrett Richards , Andrew Heaney , C.J. Wilson and Tyler Skaggs. The injury toll on their rotation previously prompted them to sign Tim Lincecum and acquire Chacin via trade.

Tropeano has given up two earned runs or fewer in seven of his 10 starts this season.

Alden Gonzalez has covered the Angels for MLB.com since 2012. Follow him on Twitter and Facebook, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.