A weekly look at what the Carolina Panthers must fix:

The Baltimore Ravens had three runs of 21 yards or more against Cleveland in their most recent outing. Next up is a Carolina team that has given up three runs of 50 or more yards in its first three games, including runs of 81 and 50 yards in Sunday night's 37-19 loss to Pittsburgh. The Panthers didn't allow a run of more than 46 yards all last season, and none more than 38 the past 14 games.

The problem each time has been the same. The offensive line has gotten a good double-team push into the second tier of the defense and the linebacker has gotten trapped on the wrong side of the push. Both times against Pittsburgh, middle linebacker Luke Kuechly was on the wrong side.

There are two issues that need to be resolved. First, the defensive tackles have to do a better job of holding their ground at the point of attack. Secondly, the linebacker can't hesitate to fill the open crease. Baltimore is a physical team, like Pittsburgh, that wants to run. The Ravens ran 33 times for 160 yards against Cleveland and are averaging 137 yards a game. The Panthers typically are a good run defense, but they weren't Sunday. They allowed two backs to run for more than 100 yards against them for the first time since 2001. One hundred and thirty of those yards came on two plays. Had everybody done their job correctly, those runs could have been held to four or five yards.

As defensive coordinator Sean McDermott said, it's an issue that can be fixed, but if allowed to fester could develop into a bigger issue.