The 31-year-old Coghlan has combined to hit .155 (30-for-194) with five home runs and 14 RBI in 70 games this season between Oakland and Chicago. He was placed on the 15-day disabled list on July 3 with a right rib cage strain. Coghlan saw action in five rehab games as part of his return, batting .500 (8-for-16) with four doubles, six RBI and a 1.369 OPS with Double-A Tennessee.
Coghlan rejoined the Cubs through a trade with Oakland on June 9 after spending the 2014 and 2015 campaigns with the club, batting .265 (219-for-825) with 53 doubles, 11 triples and 25 homers in 273 games with the team. Last season, Coghlan set career marks with 16 homers, 58 walks, 47 extra-base hits and 148 games played as he helped the Cubs to a playoff berth. He was traded from Chicago to Oakland February 25 of this season for right-handed pitcher Aaron Brooks.
La Stella, 27, is batting .295 (31-for-105) with nine doubles, a triple, two home runs and eight RBI in 51 games for the Cubs this season.