He played for the Portland Trail Blazers (1984–1995), Golden State Warriors (1995–96), Los Angeles Lakers (1996–97), Seattle SuperSonics (1997–98), San Antonio Spurs (1998–2000), and Milwaukee Bucks (2000–01).

Following his playing career, Kersey worked with his former Portland teammate and then-head coach of the Milwaukee Bucks Terry Porter as an assistant in 2005.

[2] Coming from a school that was not known as a basketball powerhouse, Kersey was selected in the second round of the 1984 NBA draft (46th overall pick) by the Portland Trail Blazers.

He was a regular contributor from the bench, eventually becoming a starter, and by his third year, he began to shine, even coming in second behind Michael Jordan in the Slam Dunk Contest.

He became a starter and was part of the nucleus of a strong Portland team, along with Clyde Drexler, Terry Porter, Buck Williams, and Kevin Duckworth that made it to the NBA Finals two out of the next three years (in 1990 and 1992).

By 1995, Portland had several talented forwards, and he was left unprotected in that year's 1995 NBA expansion draft when he was selected by the Toronto Raptors, but they waived him before the 1995–96 season began.

[4] He signed with the Golden State Warriors, where he started 58 games, and had an altercation with Latrell Sprewell, which resulted in the latter threatening to bring a gun to practice.

[6] Kersey provided frontcourt depth and experience off the bench in the team's title run, although his scoring, rebounding, and minutes played were all career lows.

[12] Kersey married his girlfriend of over nine years, Teri (Teresa Folsom) Donnerberg, on September 21, 2013, at the Columbia Edgewater Country Club in Portland, Oregon.