I always use that Speaker at $160 mil cap. I don't know about Walker, but Speaker routinely hits .310+ for me. I like to use Polo Grounds IV though, so I don't know about the park. I usually bat him 2nd, put him in , and don't worry about him the rest of the season. Probably the most consistent player I've drafted. Racks up a decent amount of steals as well, though the success rate isn't great.