Summary
Rollins was a late bloomer, as he was not a high level recruit but immediately made an impact upon arriving at Toledo, playing there for two seasons before entering the 2022 NBA draft. He was drafted in the 2nd round by the Warriors, but did not get any real playing time, and was traded to Washington in the summer of 2023 where he was waived mid-season after some off-court issues involving theft. 

Rollins was a three-level scorer in college, and showed some real shot-creation ability. He has a solid handle, and enough skill to hit contested shots. However, the questions on Rollins coming into the draft were whether or not he would be able to create separation against NBA defenders. He's not an elite athlete, and while he has good length, he's still only 6'3". As a primary ballhandler in college, it was also unclear how he would adapt to being a role player if he didn't become an elite enough scorer to have a high usage. Because of his limited playing time in the NBA, those questions remain.

Defensively, Rollins is somewhat held back by his limited athleticism. He does use his length to get steals, however. He also is pretty thin and can get bullied by stronger wings. 

Rollins was effective in the G-League in '22-'23, scoring over 18 points per game on 64.5% true shooting. The sample size was small with just over 200 minutes across nine games, but that is still significantly larger than his NBA sample size. He was a little less productive and less efficient in the G-League in '23-'24.

Rollins will still only be 22 years old as a potential free agent in 2024, so there's still time for him to grow and a reasonable expectation that he will do so. However, he does need to significantly improve in order to contribute to winning.
 
Cap Considerations
Rollins was waived by the Wizards in January, and has yet to sign with another NBA team.

Other teams will have multiple ways to sign him as even teams without cap space could use any of the Non-Taxpayer MLE, Taxpayer MLE, Room MLE, or Bi-Annual Exception to sign him. It's also likely that he would only have offers for the minimum, and may not even get fully-guaranteed offers.