Not sure he did much "building".
He bought a team, after it moved to Las Vegas. A team that had finished 4th in the league two years before and lost in the Conference Finals. Then they had the best record in the WNBA and lost in the Finals the year before Davis bought them. Davis bought the team and put a new President in and made Becky Hammon the Head Coach. They had a great year but lost in the Conference Finals again.
They again had the best record in '22 and '23 and won the WNBA Championships. Great teams too. Maybe they got there by Davis staying out of the way.
The Raiders on the other hand, last Divison Championship was in 2002. They got to the Super Bowl and lost to Tampa Bay 48-21.
Mark's Dad, Al Davis, was the Owner and General Manager.
Mark Davis has to sell the team. Hope the new owners take the team to a Super Bowl and then sell it back to him. Then maybe he could win one.