Chrissy Teigen -- Better Arm Than 50 Cent

We're not tryin' to start beef ... it's just a statement of fact -- supermodel Chrissy Teigen has a better arm than 50 Cent and the proof is in the video.

The Sports Illustrated swimsuit cover model -- who's doing the ole first pitch thing at Dodger Stadium next week -- played catch with her superstar hubby John Legend in NYC ... and it looks like she's got skills when it comes to firing a baseball.

Well, more than 50 Cent anyway ...