Chalmers was outrighted to Double-A Tennessee on Sunday, Aaron Gleeman of The Athletic reports.
Chalmers was designated for assignment by the Cubs on Friday, Meghan Montemurro of the Chicago Tribune reports.
Chalmers was claimed off waivers by the Cubs on Saturday, Meghan Montemurro of the Chicago Tribune reports.
Chalmers was designated for assignment by the Twins on Saturday, Brandon Warne of Access Twins reports.
The Twins optioned Chalmers to minor-league camp Sunday, Betsy Helfand of the St. Paul Pioneer Press reports.
Chalmers was optioned to Double-A Pensacola on March 9.
Chalmers was added to the Twins' 40-man roster Wednesday, Dan Hayes of The Athletic reports.
Chalmers was traded from the Athletics to the Twins on Thursday in exchange for Fernando Rodney.
Chalmers stepped away from baseball for a personal issue in late May, Justin Perline of Baseball America reports.
Chalmers, 19, has a 3.57 ERA, 1.22 WHIP and 37:16 K:BB in 35.1 innings with short-season Vermont.