Racing PositionsRays reacquire reliever Guerra from Brewers2YMarlins remove Barraclough from closer role6YVan Slyke, 4 pitchers sign minor league deals7YRelief Efforts: Frieri, Downs sharing saves13YTristan H. CockcroftRelief Efforts: Bullpen shakeups across league13YTristan H. CockcroftRelief Efforts: Closers on shaky ground13YTristan H. Cockcroft