Dolphins RBs Lamar Miller, Jay Ajayi becoming a dangerous duo

Jay Ajayi is averaging a gaudy 8.1 yards per carry over the past two games. Alex Goodlett/Getty Images

DAVIE, Fla. -- The running game the Miami Dolphins always envisioned since spring organized team activities is finally coming to fruition in the second half of the season.

Speedy starter Lamar Miller has paired well with power tailback Jay Ajayi to provide a dynamic dual-threat in the backfield. Miami has tried different combination throughout the season, such as Miller-Jonas Gray and Miller-Damien Williams, without much success. However, Ajayi has provided the boost and fresh legs to give Miller a rest without a drop-off in production.

Ajayi spent the first seven games on injured reserve with a rib injury. But since his return, he’s come off the bench to rush for 89 yards on 11 carries. The rookie fifth-round pick is averaging 8.1 yards per carry.

“I’m sure he would love it to be one of those games where you have a bunch of carries and his will just keep going up,” Dolphins offensive coordinator Bill Lazor said. “I don’t see any reason why it won’t keep going up.”

Miller and Ajayi have combined for 323 total yards and three touchdowns in the past two games. Ajayi has done all of his work running the ball, while Miller has shown a new dimension this season as an improved receiver out of the backfield.

Miller is Miami’s third-leading receiver with 33 catches for 319 yards. He is on pace for a career-high 66 receptions. Ajayi getting more of the tough yards inside lately has allowed Miller more opportunities to get the ball in open space. Miller has 13 receptions for 147 receiving yards in the past two games.

“I still put in the time in the playbook as I did before,” said Miller on becoming a better overall tailback. “I just try to do my job and my responsibilities.”

Overall, Miami’s offense needs to score more points. Despite the boost Miller and Ajayi have provided, the team is 23rd in scoring at 21.2 points per game and 31st in third-down conversions.

Those numbers must improve Sunday when the Dolphins host the Dallas Cowboys (2-7), who have lost seven games in a row but will have starting quarterback Tony Romo back in the lineup from a collarbone injury.