Don't think any level of baseball above Little League (and maybe Babe Ruth) has any kind of innings limit. I saw a high school tournament game a couple weeks ago that went 12 innings; one pitcher went the full 12, the other one went "just" 10 -- but threw 166 pitches. Both coaches should be charged for the criminal abuse of young arms. Anyway, there's no limits in the pros, other than the common sense of the manager, and that's often in short supply.
"I'm telling ya, he jumped us. Gloves off, stick down, no warning. He challenged the Chiefs. Called us names. But Dave was there."
"Dave's a killer."
"Yeah, Dave's a killer."
"Dave's a mess."