CHICAGO — The Chicago Cubs are poised to acquire pitcher Clay Holmes and outfielder Tyrone Taylor from the New York Mets for touted infield prospect Jefferson Rojas. Earlier in the day, Chicago obtained reliever Ryan Zeferjahn from the Los Angeles Angels for two minor leaguers: catcher Moisés Ballesteros and right-hander Mason McGwire — son of retired slugger Mark McGwire. The team also added left-hander Braxton Garrett from the Miami Marlins for a pair of minor leaguers: infielder Jonathon Long and right-hander Jace Beck. Those deals came one day after the Cubs augmented their rotation by acquiring veteran starter Kevin Gausman in a trade with the Toronto Blue Jays. Holmes, a former Pittsburgh Pirate, appears just about ready to return from a broken right leg that has sidelined him since mid-May.