Chicago Cubs superstar Kris Bryant is already killing in 2017 ... dude just married his high school sweetheart in a massive Vegas wedding -- packed with teammates and other MLB superstars.
The 25-year-old 3rd baseman swapped "I Dos" with Jessica Delp -- his girlfriend since high school -- at the J.W. Marriott in Sin City.
A photo posted by Jessica Delp (@jessica_delp) on Jan 8, 2017 at 1:40pm PST
Some of the guests included Cubs' teammates Anthony Rizzo, Jason Heyward, John Lackey and Justin Grimm.