Tom Brady wasn't 100 percent healthy this season.

The Patriots quarterback played through an MCL sprain during the regular season that took him a couple weeks to overcome, according to NFL Network, which cited unidentified sources.

But the good news is Brady has fully recovered heading into the divisional round playoffs when the Patriots face the Chargers after resting his knee during the bye. Additionally, there is no structural damage in his knee and the Patriots don't have any medical plans for Brady after this season.

From @gmfb Weekend: #Patriots QB Tom Brady, once dealing an MCL sprain, is healthy now... while TE Rob Gronkowski will weigh retirement after the season. pic.twitter.com/Phi1THkOCq — Ian Rapoport (@RapSheet) January 13, 2019

The 41-year-old quarterback initially injured his knee Nov. 11 against the Titans in Week 10 and stayed on the injury report until Week 15. Despite the setback, Brady didn't miss a game during the 2018 season as he started in all 16.

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"I was on the injury report for I think three or four weeks with a knee, but I've been practicing every day since I came off that, and I feel great," Brady said late in December (per NFL.com). "I really do. Everyone has little bumps and bruises."

The 41-year-old quarterback enters Sunday's divisional playoff game having thrown for 4,355 yards and completing 65.8 percent of his passes as he led New England to an 11-5 record.

The Patriots will host the Chargers at Gillette Stadium with kickoff set for 1:05 ET Sunday.