He didn't have any stats last week, but that was because he was on a bye. Before that, you may have heard about his unbelievable 329-yard game against the Cowboys on 14 catches and 17 targets. He was also a tremendous producer in the week prior to that outburst, racking up 155 yards and two scores against the Bengals.
The Bears actually held Megatron in check on Week 4 with only four catches for one TD and 44 yards. Of course, they're not likely to have that kind of success since he's ripped them apart throughout his career.
Fantasy impact: On his way to a record-breaking season last year, Calvin did most of his damage in the second half of the season. He's arguably the most valuable piece in fantasy and the Lions are going to lean on him as they try to make their way into the playoffs.