The 26-year-old Beeler joins the Cubs for the third time this season, as he twice recorded no-decisions when making the start as the club's 26th man: on July 7 vs. St. Louis when he limited the Cardinals to two runs on four hits in 5.0 innings in Chicago's 5-3 victory, and on July 22 in Cincinnati, when he allowed five runs (three earned) in 2.0 innings in Chicago's 6-5 win. Beeler made his major league debut with the Cubs last year and went 0-2 in his two big league starts despite posting a 3.27 ERA (4 ER/11.0 IP).
Beeler is 2-5 with a 6.02 ERA (43 ER/64.1 IP) in 14 starts with Iowa this season, though he is 1-0 with a 2.01 ERA (7 ER/31.1 IP) in his last six minor league starts. Beeler began the season on the major league 15-day disabled list with right shoulder inflammation and was activated and optioned to Triple-A on May 18. He has pitched six innings or more in four of his last six outings while allowing two earned runs or less in all six, including zero or one earned run in three starts. He has struck out 31 batters and walked only three in his last 31.1 innings.
The 6-foot-5, 210-pound Beeler went 9-6 with a complete game and a 3.40 ERA (47 ER/124.1 IP) with Iowa last year. He struck out 83 batters and walked only 32 in 124.1 innings pitched during his first-career season in Triple-A.
Beeler is in his sixth professional campaign since being selected by the Cubs in the 41st round of the 2010 Draft out of Oral Roberts University. Beeler reached Double-A Tennessee in his first full pro campaign in 2011 and made a career-high 27 starts for Tennessee in 2012 before being slowed by a sprained finger on his right hand in 2013, limiting him to only nine starts. Beeler is a career 23-29 with a 3.89 ERA (213 ER/492.2 IP) in 100 minor league outings (92 starts).
Medina, 27, has no record and a 7.00 ERA (7 ER/9.0 IP) in five relief appearances with the Cubs this season and is 0-2 with one save and an 8.68 ERA (18 ER/18.2 IP) in 16 relief outings with Iowa this year.