CLEVELAND, Ohio -- There has been a lot of talk about the Cleveland Cavaliers needing a backup point guard, and they do.

But the lack of a backup point guard is not why they are 5-5 in January.

They have had to deal with some minor injuries to Kyrie Irving and Kevin Love, while also trying to get comfortable with newcomer Kyle Korver and adapt to playing without injured J.R. Smith.

But a real problem for the Cavaliers is their defense.

In fact, the Cavs have been a mediocre defensive team most of the season, ranking No. 16.

And they are playing LeBron James too many minutes, something that could come back to bite them later in the season, or in the playoffs.

We talk about it in this video.