Blue Jays place closer Jordan Romano on IL with recurring back issues, recall Nate Pearson

Romano was placed on 15-day IL due to sore lower back, an issue he's dealt with previously
Romano left All-Star Game in July and didn't pitch again until July 20 due to back problems
During recent outing, Romano appeared uncomfortable on mound before being replaced
Romano is tied for AL lead with 28 saves and has 2.79 ERA this season
Blue Jays called up right-hander Nate Pearson from Triple-A to take Romano's roster spot