He definitely started out with a lot of talent, but I highly doubt the most ever.
Also, worth noting that Babs, who is certainly an asshole but was also considered a high end coach, was doing quite a bit worse with similar talent. Like year-by-year, looking at the year that was split Keefe/Babs, and 2 years on either side:
- 2017/18 (Babs)
- 49-26-7 (60% win pct, 64% points pct)
- 2018/19 (Babs)
- 46-28-8 (56% win pct, 61% points pct)
- 2019/20 (the Babs portion of the season)
- 9-10-4 (39% win pct, 48% points pct)
- 2019/20 (the Keefe portion of the season)
- 27-15-5 (57% win pct, 63% points pct)
- 2020/21 (Keefe)
- 35-14-7 (63% win pct, 69% points pct)
- 2021/22 (Keefe)
- 54-21-7 (66% win pct, 70% points pct)
I do think Keefe has had the team performing quite a bit better than Babs, and probably significantly better than most coaches in the league would have this team performing.