I had played an entire season with 1 goalie — Marek Maly in Season 3 I guess. One good thing about a single GK is you don't have to worry about the other dropping morale. So when he comes back, his performance is totally bogus. That's what happened to Ishorik. So I tried to experiment. McElrean is showing dangerous form of 8-8-8-8-7 (where in the last match he conceded 3.) So I guess it's safe. They have never got injured, at least in my case.