By Tzvi Machlin Coming off their first playoff season of the post-Tom Brady era, it’s more important than ever for the Patriots to nail free agency every year. To that end, they have three impending free agents that they’re likely to keep. According to ESPN’s Mike Reiss, the Patriots have three players who he considers likely to stay. Special teams ace Matthew Slater, defensive back Devin McCourty and quarterback Brian Hoyer are all expected back in 2022. Slater is one of the most prolific special teams players of all-time. He is a 10-time Pro Bowler and a five-time All-Pro selection. He’s als…