Any person that saw the Miami Dolphins play in 2016 knows how difficult it was to tackle running back Jay Ajayi. Now there’s evidence to back that up.

According to Pro Football Focus, 70.7 percent of Ajayi’s rushing yards came after he generated contact. That means nearly 900 of his 1,272 rushing yards in 2016 came after first contact. According to PFF, the 70.7 percentage after first contact was the second best in the league last season.

Ajayi became the starting running back in Week 5 after the Dolphins rushing attack was ineffective in their previous four games. Once Ajayi became the starter, he averaged 99.75 yards per game.

This offseason, Ajayi is improving his pass-catching ability to go along with his dominant ground game. Last season, Ajayi caught 27 receptions for 151 yards in 2016.

“But right now, having a couple years under my belt, knowing what I want to be, I want to be the best,” Ajayi said in a press conference earlier this month. “I strive for that. I know that to be considered the best at the running back position, you have to be a guy that can do it all. Last year, I was able to do a lot of great things on the ground, but I felt like something was missing in my game. I knew I could do it, so I just wanted to be able to come out and practice and continue to work at it, continue to show that I can do it and be consistent.”