Mike Iupati headlines 2015 free-agent class of offensive linemen

Beyond 49ers left guard Mike Iupati, a first-round pick in 2010 who was selected to the Pro Bowl this year, few marquee names will be available along the offensive line when free agency opens in March.

Beyond 49ers left guard Mike Iupati, a first-round pick in 2010 who was selected to the Pro Bowl this year, few marquee names will be available along the offensive line when free agency opens in March. Still, there are plenty of intriguing questions to be answered up front as the league enters free agency. Will the Packers and Cowboys pay up to keep their vastly improved offensive line together? Have the Chargers seen enough from King Dunlap at left tackle to invest in him long-term?

• 2015 NFL free agents: Every position| 2015 NFL Mock Draft: Round 1, 2

Find all the notable free-agent offensive linemen below.

. Joe Barksdale, OT

St. Louis Rams

. Byron Bell, OT

Carolina Panthers

. Clint Boling, OG

Cincinnati Bengals

. Bryan Bulaga, OT

Green Bay Packers

. James Carpenter, OG

Seattle Seahawks

. Brian De La Puente, C

Chicago Bears

. King Dunlap, OT

San Diego Chargers

. Orlando Franklin, OG

Denver Broncos

. Doug Free, OT

Dallas Cowboys

. Rodney Hudson, C

Kansas City Chiefs

. Mike Iupati, OG

San Francisco 49ers

. Derek Newton, OT

Houston Texans

. Jermey Parnell, OT

Dallas Cowboys

. Erik Pears, OG

Buffalo Bills

. Dominic Raiola, C

Detroit Lions

. Michael Roos, OT

Tennessee Titans

. Samson Satele, C

Miami Dolphins

. Rob Sims, OG

Detroit Lions

. Eric Winston, OT

Cincinnati Bengals

. Stefen Wisniewski, C

Oakland Raiders