Harris, a Lieutenant in the United States Navy, missed the 2016 season due to a right arm injury that ultimately required midseason elbow surgery. The setback came a year after Harris became the first Naval Academy graduate to reach the Majors since 1921. As a rookie in 2015, Harris posted a 3.67 ERA over 26 appearances.
Rosario debuted for the Cardinals on July 9 and remained on the big league team as a backup catcher for the rest of the 2016 season. He went 7-for-38 and made eight starts as Yadier Molina's backup.
Ohlman, who was traded to the Cardinals in February 2015, never pushed past Triple-A during his two seasons in the system. This year, he split time between Double-A and Triple-A and combined to hit .287/.344/.434 in 78 games.
Jenifer Langosch has covered the Cardinals for MLB.com since 2012, and previously covered the Pirates from 2007-11. Read her blog, follow her on Twitter, like her Facebook page and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.