All teams fear the same thing in spring - an injury to a key player - and the Mariners got a bit of a scare today.
Tyler Walker, the big right-hander who's a candidate to close, felt his right quad tighten up during a fielding drill and immediately headed for the training room.
"It's not bad, and five years ago I'd have kept going and it would have gotten worse," Walker said. "I think I caught it in time, and I'd like to throw tomorrow on schedule, but we'll see."
It may be nothing more than tightness, but leg injuries tend to linger in spring, when players are trying to get into game shape.
There are plenty of candidates to close - from David Aardsma to Roy Corcoran to Mark Lowe to Miguel Batista.
Walker has as much experience closing as anyone. This could be nothing or it could be a setback.
We'll find out tomorrow.