The NCAA's Division I Council voted on Tuesday to shorten the transfer portal windows for men's FBS and FCS football and men's basketball to 30 total days, per multiple sources.

The winter window for football will take place over 20 days, while the spring window will have 10 days in total.

The transfer portal has proven to be a controversial addition to college sports.

The positive side has been that it offers athletes more mobility and the freedom to leave situations that don't suit their own futures. It also offers top programs the chance to add an influx of more experienced talent immediately, creating a new form of program-building for coaches.

The downside has been that it creates a more hectic schedule for coaches, especially in a winter window that coincides with bowl season and comes shortly after National Signing Day.

More and more college football players, in particular, are also choosing to opt out of seasons early and announce their intentions to enter the portal. In some cases, those players—like UNLV running back Michael Allen and Matt Sluka—have chosen to redshirt this season and enter the portal after saying that NIL promises weren't made.

Other players, like Alabama junior defensive tackle Jehiem Oatis, chose to redshirt and enter the portal after being unhappy with the playing time he's received this season. Leaving the Crimson Tide will offer him the opportunity to find a situation where he could receive more snaps and put out more tape for NFL evaluators.

"Getting the reps and looks that I'm getting, I feel like it's better for me to move on somewhere new," he told ESPN's Pete Thamel.

The transfer portal continues to divide opinion, but it is here to stay, at least in the current landscape of college sports.