Jamal Lewis says that very well could be the NFL's top quarterback list in just a few seasons ... 'cause the Ravens legend tells TMZ Sports he thinks the Baltimore QB has that much potential.
"I really think he can be one of the greatest quarterbacks in the NFL in a few years," Lewis says.
Lamar just set the Miami Dolphins on fire last Sunday, throwing for 5 TDs and 324 yards ... and Lewis says, after that performance, he's convinced the guy has a HUGE ceiling.
"I think he can really break some records in this league," Lewis says.