Beverly Hills, 90210

I came to the BH 90210 universe pretty late. I didn't start watching until the third or forth season, but became immediately hooked. Luckily I was able to catch the prior seasons during reruns a year or two later. I've always felt that the Brandon Walsh (Jason Priestley) character was the heart, soul, and moral center of the series. He had his demons of course, but don't we all. The other majors characters were well cast, and really made you think about the years when we were in high school. But there's one thing that's bothering me, especially since I looked up the IMDb page when the show was finally being released on DVD. I've seen almost every episode of this series. I admit I didn't watch it as much after Jason Priestley left the show. But for the life of me I can't remember a character called Keith, who supposedly according to IMDb was in 291 episodes. Does anyone know who this guy is, or is this a typo by IMDb?