I'm pretty sure it was the same shoulder, but I've also heard that he didn't come back too soon and it really was just a freak accident. He got injured on December 6th 2014 and didn't play another game that season, so it doesn't sound like he rushed back (unless I forgot another injury in-between?)

Sidenote to that nonnie who was asking about Olli's friends on the team, there were several articles recently where Ian Cole was gushing about how great Olli is.