Because we have two players who perform to their ability more often than not and have made the step up already? One of them will get injured at some point. That is the normal time to bring someone in. I agree though that it certainly might be time to give him more than 10 minutes. When we cure the 20-30 minutes 'engine running' time at the start of each game and attack teams from the off it might be possible to give him 30 minutes to the whole of a second half to prove himself and provide genuine competition. At the moment he doesn't.