Rondon is dealing with shoulder tendinitis that was discovered during a recent MRI, Dana Wakiji of FOX Sports Detroit reports. Rondon doesn't expect the ailment to be serious, but it may sideline the reliever for a few days leading up to the regular season. The right-hander has allowed four earned runs on 10 hits over 7.1 innings this spring, and expects to work in middle relief in the majors in 2015.