Player grades: Third-period collapse sinks Oilers in spirited Battle of Alberta

Oilers 2, Flames 4
Two different hockey games in Calgary on Saturday night. Despite beating a steady path of one-way traffic to the penalty box, a fired-up crew of Edmonton Oilers carried the play and a 2-0 lead through the first 30 minutes of play. They came apart at the seams after that as Calgary Flames ramped it up to dominate possession, play, and most importantly the scoreboard. The Flames poured in four unanswered goals down the stretch to take a 4-2 decision.
The visitors had plenty of c