NL Rookie of the Year Kris Bryant is obviously a veteran in love ... 'cause the Cubs third baseman just got engaged to his school sweetheart Jessica Delp.
Bryant announced the engagement with a tweet (kids today) saying ... "Only took me 8 years, but I can't wait to marry my best friend! Perfect way to end an unforgettable year!"
No word on when the two are tying the knot, but we do know one thing ... Bryant -- a good looking, young millionaire -- is forgoing years and years of random chicks.
We kid ... congrats, Kris.