Read the updated story with quotes from Zimmerman on CSNwashington.com
Zimmerman, who won the award last season for the first time, appeared to be favored to earn the nod again, but he faced a deep field of fellow third basemen that included Rolen, the Phillies' Placido Polanco, the Mets' David Wright and the Padres' Chase Headley.
Rolen earned his eighth career Gold Glove, though his first since 2006. The 35-year-old enjoyed a stellar comeback season in Cincinnati, committing only eight errors while posting a .977 fielding percentage. Zimmerman committed 17 errors with a .951 fielding percentage.
Zimmerman, though, had a better case through advanced fielding metrics. He bested Rolen in Ultimate Zone Rating (13.9 to 10.6) though Headley led all NL third basemen in that category with a rating of 16.5.
The nine NL winners, one for each defensive position, are...
C: Yadier Molina, Cardinals
1B: Albert Pujols, Cardinals
2B: Brandon Phillips, Reds
SS: Troy Tulowitzki, Rockies
3B: Scott Rolen, Reds
OF: Carlos Gonzalez, Rockies
OF: Shane Victorino, Phillies
OF: Michael Bourn, Astros
P: Bronson Arroyo, Reds
Only three of the 18 Gold Glove winners between both leagues played for teams with sub-.500 records: the Astros' Bourn and the Mariners' Ichiro Suzuki and Franklin Gutierrez.