There’s little to be concerned about with the Orioles enjoying a 9 1/2 game lead in the American League East entering the weekend, but the late innings of Thursday’s 9-7 win over the Cincinnati Reds suggest there might be something worth monitoring in the short-term future. The Orioles bullpen has been stellar all season, ranking fourth in the AL with a 3.21 ERA, but there have been a few leaks over the last week that likely grabbed the attention of manager Buck Showalter. Baltimore relievers only rank sixth in the AL in innings pitched, which doesn’t indicate overuse being a major concern, but witnessing Brian Matusz and the newly-recalled Evan Meek warm up in the eighth inning of a two-run game Thursday — the night after Miguel Gonzalez had pitched a complete-game shutout to give the entire bullpen a night off — made it clear that Showalter didn’t have his full array of arms. Left-handed reliever Andrew Miller is currently dealing with a tweaked hamstring and hasn’t pitched since Monday when he allowed two hits and an earned run while retiring only two batters. The former Boston reliever has downplayed the significance of his injury, but it’s clear the Orioles