Dustin Ackley will make his first major league start in center field Friday against the Cubs. Mariners manager Eric Wedge resisted playing Ackley there for a day game on Wednesday, but he'll have enough prep time leading up to Friday's game to get comfortable. Fresh off hitting .365/.472/.500 in 25 games with Triple-A Tacoma, the 25-year-old should get plenty of playing time between center field and left in the coming days with Franklin Gutierrez and Michael Morse both on the disabled list.