rihannamatt230.jpgAfter only eight months of dating, L.A. Dodgers center fielder Matt Kemp is planning on tying the knot with girlfriend Rihanna, according to Us.

The Only Girl singer caught the baseball player's eye back in February, and ever since then, the two have been hot and heavy.

A source tells the mag, "They are in love. Seeing them interact, it's definitely possible he could propose -- but it'd have to be a long engagement, because they're both so focused on their careers."

As for what keeps the ballplayer, 26, and Rihanna, 22, going strong ... the source adds:

    "He centers her, as he has a more normal life. He allows her space, but they text and talk all the time. And they really have fun like kids when they're together. They like to laugh and be silly."


Sounds like their relationship is a home run!