It's because Sims is no good. If the far worst NBA team that again lost its center for the entire year makes no effort to keep you even on a minimum..
Henry Sims is pretty much Earl Barron.
Um. maybe so, but that's a pretty poor way to evaluate a player. There are so many reasons why a bad team would not keep a decent bench player: younger players in the wings, tanking, trade and cap issues, etc. not counting the consideration that releasing decent players is what bad teams often do, that's why they are bad.
It would probably be best to evaluate him based upon game performance. For instance, look at this vid.
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Strong player. Doesn't seem fast. Not a leaper, glaringly so. Plays position defense. Has a rebounder's mentality, always after boards. Position/power rebounder. Has a variety of nifty little moves from about 8 feet including an excellent hook shot. Looks like he has long arms. Garbage man. Played well here against Joakim Noah.
Not the player I would want as a starter on this team but I like it. He adds some things that players like Leuer and Teletovic don't have. Gives Horny another look off the bench (if he makes the team).
Just checked his combine numbers. He is listed as 6-11.75 in shoes (basically a 7 footer) with a 7-4 wingspan. That's good length. 29.5 in vert. yikes, thats pretty poor.