Outside of Zack Martin, there's nothing but question marks surrounding the Dallas Cowboys offensive line.

How much longer does Tyron Smith have? Will Connor Williams be re-signed? Is La'el Collins or Terence Steele the future at right tackle? Has Tyler Biadasz done enough to remain the starter?

Even though the Cowboys offensive line ranks first in the NFL according to PFF, it's living off reputation. Not present circumstances.

Present circumstances are sad but true. Tyron Smith is still great when on the field, but keeps missing time due to injury. Collins is a good right tackle, but Steele has proven to be more reliable. Biadasz is both better and worse than people claim him to be. Williams is a good blocker and athlete, but his penalties made him a liability.

Last off-season, the Kansas City Chiefs reworked their entire starting offensive line and it paid off. It won't have to come to that for the Cowboys, but some changes do need to be made. One of them is likely to come at left guard.

Connor Williams lost and regained his job in 2021 due to the high volume of penalties. Despite missing three starts, he still finished second in the league in penalties, but only gave up one sack.

Aside from penalties, Williams has been a solid guard and will likely garner a lot of interest on the market. His value, according to Spotrac, is estimated over $13 million per year. With the Dallas Cowboys having to make cap gymnastics in the coming months, he might be too pricey to return.

A gaping hole in the middle of the line would likely be filled in March. The Cowboys philosophy has always been fill starters (cheap) in free agency and draft talent. Not need.

In the case of Quinton Spain, Dallas would will fill the void and not have a dip in skill.

Spain has been the full-time starter at left guard for the Cincinnati Bengals for the last two seasons. In that time, he's only allowed six sacks and eight penalties over a combined 1,715 snaps played.

This is opposed to Williams, who committed 19 penalties and allowed five sacks in 2,094 snaps played over the same span.

Spain is a valuable veteran presence on a team in 'win-now' mode, with Super Bowl aspirations. Being a long-time starter and playing in this past Super Bowl adds to Spain's value, just not as expensive.

In 2021, Spain played on a one-year deal worth $1,127,500. This is a figure that's much more friendly to the Dallas Cowboys front office. The only question is: How much does he value himself?

He will be 31 in August, and will command suitors. Especially when considering his skills, experience and cap-friendly value.

The Cowboys are likely to draft an offensive linemen in the upcoming NFL Draft. Bringing in Spain means they won't need to address the guard position early and could instead take a developmental player to play behind the starters.

While not the sexiest name on the free agency market, he checks plenty of boxes this team needs.

Featured image via-Mark J. Rebilas-USA TODAY Sports