Voadam
Legend
Except 2 things
1. the stats themselves are not
2. They can hold you up in court to you run out of money to fight
1 True but the question was whether the names that were released as OGC could be used in an OGL product, not the stats. You could attach whatever stats you wanted to the names, such as say OGC 3e High Elf stats to the OGC name Eladrin.

2 Only a risk if you believe WotC would file and continually pursue an obviously baseless harassment suit targeting activity they themselves explicitly licensed you to do. I leave it to your discretion if you believe that is a real risk.