What we found is that JB Mauney is currently in a relationship with Samantha Lyne.

JB and Samantha via kwout
Samantha is the younger daughter of five-time PRCA World Champion Phil Lyne. She was raised on horses, beginning her barrel racing career on Tom – one of her father’s steer roping horses.
James Burton "J.B." Mauney is an American professional bull rider on the Professional Bull Riders tour. According to TMZ, he's pretty much the LeBron James of bull riding...having won the 2015 World Championship and made over $1.5 million last year.
Tip! To get the latest updates about JB Mauney, just follow him on Twitter @jbmauney and on Instagram