Jalen Ramsey Gets His Baby Mama A Birthday Rolex, 'Icier Than Me!'

Forget being the best DB in the NFL ... Jalen Ramsey is gunnin' for best BF honors -- 'cause the Jacksonville Jaguars superstar got his baby mama a DOPE Rolex for her birthday!!!

Of course, JR is famously dating Giants WR Golden Tate's sister -- Breanna Tate -- and for her cake day ... he got her some ICE for her wrist.

Unclear which make and model the Rollie is ... but similar gold & diamond Rolexes run in the $35,000 range!!!!!

"My Queen gon stay fresher & icier than me I PROMISE," Ramsey wrote of the gift.

24-year-old Jalen and Breanna have been going strong for a while now ... and the two just had a little baby girl together last summer.

In fact, Jalen missed a portion of Jags training camp last season for the birth of their child, writing, "family is among the most important things in my life."