But, Jones was still jacked over Mountcastle's knock regardless ... and decided to reach out to the 24-year-old slugger to congratulate him on the blast.
Turns out, Ryan felt bad about hitting the guy ... and promised him an autograph when he returned to Camden Yards.
Fast forward to Wednesday night ... and Mountcastle delivered!!
At an O's game last week, Jake Jones (@JuicyJ_ake) took a Ryan Mountcastle homer to the dome. After connecting on IG, Mountcastle said to let him know next time he was at a game and he'd sign a bat for him.