There really weren't any other candidates for the Pro Bowl on offense, unless you count Alex Mack for consistency purposes. On defense, I thought D'Qwell Jackson would have been a strong candidate to make his first Pro Bowl, but Ray Lewis and Derrick Johnson made it ahead of him. Second-year cornerback Joe Haden also failed to make the Pro Bowl, losing out to the likes of Darrelle Revis, Champ Bailey, and Jonathan Joseph. Rookie defensive end Jabaal Sheard didn't make it despite all of the sacks and forced fumbles he has this season.
The alternates to the Pro Bowl should be announced over the next day or so, and it wouldn't be surprising to hear the names mentioned above (Mack, Haden, Jackson, and Sheard) be on the list of alternates. I believe that is how Mack made the Pro Bowl last season.
Hat tip goes to TheLicensedPessimist for posting this as a FanShot.