Pouncey underwent hip surgery Monday and will miss three months, potentially ruling him out of the first three games of the season. Depending on his recovery, the Dolphins could place the former Florida Gator on the physically unable to perform (PUP) list to begin the season, which would rule him out for the first seven weeks (he would be eligible to return Week 8) but opens up a roster spot.
The team used Sam Brenner at center at times during last week's minicamp, and Nate Garner is also a possibility to replace Pouncey, who was the lone holdover from last year's starting offensive line.
As for Moreno, he will undergo arthroscopic surgery on his left knee. The former Bronco had been limited in the team's early offseason activities, and last week worked on the side with a trainer.
Moreno, who will miss 4-5 weeks and probably the start of training camp, tore the ACL in his right knee in November 2011 and had surgery again on the joint after the 2012 season.
Moreno was signed in March to compete for the starting running back job with incumbent Lamar Miller and others.