After multiple acts of terrorism, Batroc is sent to Seagate prison. His reputation of surviving a fight with Cap has caught attention of the guards. They offer Batroc a chance to participate in their fight arena. Carl Lucas is the current dominate fighting champion.
The incentive is for whoever wins, they get freedom, so both Carl and Batroc are giving it there all. So morals off.
Frieza during the Namek saga was just an overpowered tank. He didn't need to train, he was pretty much a Superman-esque character with all these abilities that made moon-planet busters feel like ants, power wise. With that said with equal stats, and taking away his ability to fly, and with his cocky attitude, Roshi will out skill him. Frieza may get lucky with TK or another unpredictable move but overall Roshi wins 8/10.