OAKLAND ATHLETICS — Activated LHP Sean Doolittle from the 15-day DL. Activated RHP Jose Rada from the injured list. Placed OF Adam Ford on the seven-day injured list. OAKLAND RAIDERS — Signed CB Dexter McDonald. COLLEGEHOBART — Announced the retirement of men's assistant basketball coach Carl Wenzel. MARQUETTE — Named Stan Johnson men's assistant basketball coach. NEBRASKA — Signed men's basketball coach Tim Miles to a one-year contract extension through the 2019-20 season. NORTHWESTERN — Agreed to terms with men's basketball coach Chris Collins a contract extension. PENN STATE — Promoted Ross Condon to men's assistant basketball coach.