The two will play the first two rounds together, along with Brooks Koepka, in one of the marquee groupings at TPC Four Seasons. On top of that, Thomas and his roommate Patrick Rodgers played a practice round Tuesday with Spieth - one that seemingly ended with Thomas a few dollars richer. Later the trio returned to Spieth's home in Dallas, as the reigning Masters champ is housing both players for the week.
"It's been fun. It's cool to have all of us hang out and his buddies coming over," Thomas said. "He's got a golf simulator. We've done a little bit of that. Been a relaxing week."
Thomas is two months older than Spieth, and the two have been crossing paths since their days in junior golf. Thomas actually facilitated the union of Spieth and his caddie, Michael Greller, though he admits he's not sure what to expect from the crowds this week, where Spieth will receive hometown support.
"It's going to be pretty wild. I've never been here or played this event," Thomas said. "It will be fun, and probably the most people I've played in front of, so it will be cool for me."
Thomas enters off of four straight top-25 finishes, and has 10 such results in 19 starts during a successful rookie campaign. His maiden win, however, remains elusive.
"I could have already won two, three times this year, but it wasn't my week and there are things that I didn't do correctly that kept me from doing so," Thomas said. "I know from last year, if I just keep putting myself there, at some point eventually I would think it's going to happen."
Thomas didn't leave the press room in Dallas without taking one more shot at his friend and host for the week, as both he and Spieth teed it up at the 2010 U.S. Amateur at Chambers Bay but only Thomas made match play. How much of a benefit will Spieth receive next month from Greller, who used to caddie at Chambers Bay?
"Hopefully a lot," Thomas joked, "Because he shot about a million at the U.S. Amateur."