David Andrews missed the entire 2019 season with blood clots in his lungs, but he intends to return to the field in 2020, as Mike Reiss of ESPN.com writes. 
“I feel great,” Andrews said. “I have a bunch of doctors’ appointments in February, [hopefully] get all that cleared up, and be good to go for next year.”
Andrews still has one year to go on the three-year, $9MM extension he inked with the Pats in 2017, so he should be back in New England, provided that he’s healthy enough to play. It remains to be seen who he’s be snapping the ball to, however. Tom Brady, Andrews’ longtime partner, is intent on exploring free agency for the first time in his career.
Before the blood clots, Andrews served as New England’s primary center since 2015. He went from UDFA to the Pats man in the middle for four AFC championship games and three Super Bowls.
Andrews allowed only four quarterback pressures in 2018, the fewest among Patriots linemen. In that year, he graded as Pro Football Focus’ No. 7 center.
Without Andrews, the Patriots turned to Ted Karras as their starting center in 2019.
Three Rings why risk it?
Retire and enjoy life
Blood Clots are serious businesses
Only 4 years of playing time in NFL, 1 SB ring, clean bill of health, and still only 27.
He’ll be welcomed back with open arms in NE
Don’t know the health risk but assuming he is good to go