No one has ever advocated Wren as a starting-caliber OF. Everyone who has been advocating for him, such as myself, has always framed him as a good 4th OF - he can play all three positions (including CF adequately) and has good OBP. This season his OBP is .370 and last season, split between AA and AAA, was .412 (.383 at AA, .425 at AAA), and in 2015 put up a .370 OBP at AA. Sure, he doesn't have the power of a Nieuwenhuis or a Hernan Perez, but he doesn't strike out like those guys do either. This, this, and this. Nick Franklin, Trevor Plouffe, Eric Sogard, Ehire Adrianza... the Riveras of the world are a dime a dozen, or could be purchased for a small amount of cash if needed.