I'm slightly torn on Jeff Kent as a HOF player. Part of that is because he isn't a characteristic 2B. The numbers we would usually look for from a 2B would be OBP, SB, H, etc.,. Instead, he leads all 2B in HRs, that's the most impressive number he has going for him, and something that shouldn't be overlooked. Of course, it comes in an era when HRs were flying out of ball parks. His career .356 OBP and .500 SLG are decent, but unexceptional--the .500 SLG is pretty good (top 100 all-time), but a .356 OBP isn't that impressive by itself. He played 17 seasons and had a total of 2298 hits, which also isn't fantastic, but it puts him in the same class as guys like Chipper Jones, DiMagio and McCovey... so not bad.
It looks like his OBP went slightly up over the years, at least his attention to walks seems to have improved, which is something I always look at when trying to figure out if a player is using. Was it that pitchers suddenly started pitching around him because he was a hulking beast, or did his eye and plate discipline improve and get him slightly more walks. In his case it looks like the later.
I'm suspicious because he played with Bonds for so long, but I can't let suspicion get in the way of a good argument and won't let it play out here. He was a very productive 2B, a position that tends to not have a lot of power hitters or middle-lineup mashers, which Kent was. I don't like him as a person or as a player, but can't let that sway me either.
Overall, I guess he gets in in my opinion. He had a number of very good seasons, including 8 out of 9 seasons with 100+ RBI. He was productive with a few different teams, played for a long time, and was consistently one of the top 5 offensively at his position throughout most of that time and he wasn't moved from 2B, which tells me his defense was adequate. That's a very good career.
Unlike others here, I don't see this as a purely open and shut case. Its close, and I had to look up a number of thing before concluding 'yes'. One of them was where he hit in the lineup. He hit 4th for most of his time in SF. If he had been hitting 3rd I would have been more skeptical, with Bonds and his massive body waiting behind him. But he hit BEHIND Bonds, with guys like JT Snow behind him. His RBI numbers were helped, but he had 5 seasons in SF above his career average OBP, even with s*** behind him.
Overall, sure, he gets in.