If that was the reason it’s still bad. First, they knew what they had in Walker already pre-injury. Not a special talent. I’d argue he was a throw-in in the trade so Philly can ice some NHL caliber bodies out there, not a sweetener to take Petersen. Second, you don’t play guys hoping to get good trade value at the expense of your young talent’s growth, especially when that young talent is ALREADY better than the older guy ESPECIALLY when you consider yourself a cup contender. None of it makes sense.