A second playoff victory made the latter a lock, as if there was much doubt before, and he's now the preemptive favorite for the former.
DeChambeau's win in MA makes him the second player - after Vijay Singh in 2008 to win the first two legs of the FedEx Cup play-offs.
World number one Dustin Johnson, who is second in the FedEx Cup standings, finished in a tie for seventh, five shots off the lead.
Re-joined the European Tour specifically to play in this year's match, a decision Bjorn influenced.
DeChambeau was part of a crowded leaderboard early in the final round, with 17 players at one stage bunched within two shots.
However reluctant he may be to the idea, DeChambeau is no longer a "weird and unique" sidebar to the main attractions. Teryn Schaefer presents the best social media posts from around the world of golf in "Good, Bad & Unusual" and after each day's play brings you the biggest talking points in "The Takeaway".
"You need people like that", Bjorn said, "who have been there and done it, positively and negatively". And it is an honor, it really is.
"If I keep going that route I'll be hard to beat".
"It's been a fantastic two weeks", he said.
Furyk lost out on Woods' as vice-captain, due to his inclusion, but has added David Duval, Zach Johnson and Matt Kuchar to his team. Tiger will be representing the USA on the course in a couple of weeks.
The 48-year-old said: "Hopefully, that will make it a lot easier for Jim".
Casey is a world-class player and will be chomping at the bit having missed every Ryder Cup since 2008.
Bryson DeChambeau reacts after his birdie on the 15th hole during the final round of the Dell Technologies Championship golf tournament at TPC Boston in Norton, Mass., Monday, Sept. 3, 2018.
Woods may not understand, or even agree, with DeChambeau's Newtonian theories on the golf swing, but he appreciates what he's been able to create. "I'm just really glad that Thomas had confidence in me".
This will be Mickelson's 12th Ryder Cup appearance, and he will look to improve upon his 18-20-7 overall record.
"This is mostly likely my last chance to go over to Europe and to be a part of a winning USA team in Europe".
"You had nearly a diffusion of responsibility".
Tiger Woods remained at No. 26 with his T24 on Monday.
How much better can he get?
Thomas and DeChambeau are the only current Ryder Cup rookies on the team.
"This is most likely my last chance to go over to Europe and be part of a winning team in Europe", Mickelson said. Will be a huge influence in the team room on the Euro rookies.