Cubs Activate Hayden Wesneski, DFA Shawn Armstrong

The Chicago Cubs today activated right-handed pitcher Hayden Wesneski from the 15-day injured list and designated right-handed pitcher Shawn Armstrong for assignment.

Wesneski, 26, was placed on the injured list July 20 with a right forearm strain. In 25 appearances for the Cubs this season – seven starts – he is 3-6 with a 3.94 ERA (27 ER/61.2 IP). He made three rehab outings with Triple-A Iowa, keeping the opponent off the board in two of them.

The Houston, Tex., native, is 9-13 with a 3.96 ERA (81 ER/184.0 IP) and 174 strikeouts, compared to 60 walks, in 65 career major league games, all but 22 of which came in relief. He was acquired by the Cubs in exchange for pitcher Scott Effross at…