With an undisclosed innings limit looming, Ross will start against the Cardinals for the first time. Ross has walked zero or one batter in nine of his 11 starts, and he's struck out at least six in seven of them.
Gonzales will make his 2015 season debut in place of Carlos Martinez, who has a stiff back. The 23-year-old left-hander is ranked No. 4 among Cardinals prospects, per MLB.com. He went 4-2 with a 4.15 ERA in 10 Major League appearances in 2014.