I have suspected the rust factor to actually be there for quite some time already, but the game doesn't actually state anything about it.
Well, I always fall into the trap: "West hasn't pitched in six days ... we're losing 5-1 ... but maybe tomorrow ... tomorrow Saito's pitching ... maybe he'll come around tomorrow ... and tomorrow we'll lead 2-1 ... and whom am I gonna turn to then?"
Looking at the last three hurlers in that pen, I should not be so worried. Any of them can blow through a random set of three batters in most instances. If anything, I wouldn't want Wally Gaston pitching to a string of contact lefties. (One of those actually defeated him in that L he took - THAT would have been a chance to bring in West, but you're always smarter once the damage has been done)
I know, nobody likes Matt Workman but me. His average has now dropped, as predicted by you, too. Well, we don't have anybody else. It's hard to ship off something on a team that doesn't have many valuable pieces. We're not at that point where I'd say we do a firesale, get out some of those 30+ year olds and load up with prospects and make a run in '87/'88.