PITTSBURGH — The Pittsburgh Pirates haven't had one of their best defensive players for quite some time, but he's back just when they need him most. The Pirates announced that they ended the rehab assignment of infielder Jared Triolo and reinstated him from the 10-day injured list, while they optioned infielder/outfielder Nick Yorke to Triple-A Indianapolis. Triolo suffered a right knee patellar tendon injury back on the home opener on April 3, as he rounded third base following an RBI-double by shortstop Konnor Griffin in the eventual 5-4 win over the Baltimore Orioles at PNC Park. He stayed in that game, but missed the following contest and then went on the 10-day injured list on April 5. He started his rehab assignment with Single-A Bradenton on April 24 and then the Pirates transferred him to Double-A Altoona on April 28. What Triolo's Return Means for the Pirates The Pirates now have their best defensive player back for the foreseeable future, which will help their infield going forward.…