Ryan missed the final three games of the Cubs' series against the Reds over the weekend. Ryan has had a breakout season, posting a 2.80 ERA and 1.18 WHIP in 52 appearances while earning high-leverage opportunities from manager Joe Maddon.
Ryan will be available when the Cubs open a three-games series at the Philadelphia Phillies on Tuesday evening.
In a corresponding move, Chicago optioned righty reliever Dillon Maples to Triple-A Iowa. Maples has posted a 6.75 ERA in 11 appearances for the Cubs this season.