And literally nothing of interest happens that month except maybe sometimes the Superbowl
The sport that I follow is usually UFC.
The "off season" is a short break from the end of December to late January. Since it's a year round sport it does cause some months to be sluggish. Since the athletes are on constant rotation the less interesting ones might take up a certain part of the year.
February isn't looking great right now so I'm tempted to see what WWE is doing. I'm not caught up with pro wrestling at all though.