Rosehill's a fighter who's played 72 games in the NHL, all with the Toronto Maple Leafs, since making his debut during the 2009-10 season. He's had 198 penalty minutes in those 72 games. He is not much of a hockey player, but he can sure throw his fists around!
Rosehill's played 33 games with Anaheim's AHL affiliate in Norfolk this season but hasn't found his way to the NHL at all. According to HockeyFights.com, he's been in eight AHL fights this season. He dropped the gloves six times in 31 NHL games the year prior.
Harry Zolnierczyk is never going to be more than a fourth-line grinder in the NHL, so this really doesn't matter all that much. But Harry Z does have some hockey skill and some use on a team, and Rosehill can't even put the puck in the net at the AHL level.
We'll see if Rosehill ever makes it to the Flyers. He better not, what with Eric Wellwood and 46 other players on the Phantoms roster who deserve the call up before Rosehill does.