In 2018, Golden Tate played against the Cowboys as a member of the Lions in Week 7. He will play against the Cowboys as a member of the Eagles in Weeks 10 and 14.
Which players have played against one team three times during one regular season?
This has happened way more often than I thought. There have been 151 times that a player went up against the same team 3 or more times in one regular season. I say 3 or more, because out of those 151, two players have played the same team 4 times in a regular season! Here is the list, sorted by year and team, with the two 4-time players at the top.
I found these by going team-by-team in Pro Football Reference, using this sort of lookup: http://pfref.com/tiny/e6L0f. I have linked the Green Bay Packers as an example, and by changing the opponent in the search bar, you can see other teams too.
So using a similar method as was used before just adding in playoffs as one of the criteria: http://pfref.com/tiny/ra52c