Originally posted on Football Nation  |  Last updated 5/17/12
Steelers GM Kevin Colbert excited Pittsburghers when the team stole Stanford guard David Decastro with the 24th pick and then selected Ohio State tackle Mike Adams in the second round.

But fans should hold off a little on their celebration as head coach Mike Tomlin plans to rush both into the starting lineup and move incumbent right tackle Willie Colon to left guard according to Rotoworld.

In his first five seasons as the Steelers' head coach, Tomlin has only started one rookie, according Mark Kaboly of the Pittsburgh Tribune Review.

For that reason, Kaboly has his doubts about Tomlin lining up DeCastro and Adams next to each other at left guard and left tackle. Tomlin may have been thinking the same logic; the Steelers announced Thursday that Colon will move to left guard and DeCastro will play on the right.

It is important to note that the one rookie Tomlin did start was center Maurkice Pouncey, who has made two Pro Bowls in his first two seasons. When healthy, Pouncey may be the best center in the NFL. Tomlin may be hoping for that same kind of early impact from both DeCastro and Adams.

It would, however, be unrealistic to think this now young offensive line will not experience growing pains with a quarterback who tends to hold onto the ball too long. Four of the five offensive linemen who will presumably start Week 1 are Adams (left tackle), Pouncey (center), DeCastro (right guard) and Marcus Gilbert (right tackle), who was a 2011 second-round pick out of Florida. They are all notably younger than 25 as well, and have a combined three seasons in the NFL.

The veteran starter on the offensive line will be 29-year-old Willie Colon, but he has started one game in the last two seasons. Colon tore his Achilles tendon in the summer of 2010 and injured his triceps in Week 1 of 2011. Both injures caused him to miss the rest of the season.

Despite missing 2010, Pittsburgh signed Colon to a five-year deal worth $29M last summer. This offseason, Pittsburgh restructured several players’ contracts, but it seemed Colon was unwilling to take a paycut. The two sides did come to terms, so Colon will be back with the Steelers.

Even though he may have disliked the paycut, the former right tackle is acclimating nicely to the switch inside.

“I like it. It’s just a matter of learning the verbiage,” said Colon, according to Rotoworld.

Even if Colon makes a smooth transition to left guard, the Steelers have two other rookies to worry about and one at left tackle, the blind side of franchise quarterback Ben Roethlisberger.

One day down the road, this could be one of the best offensive line units in the NFL, but Steeler fans shouldn’t expect that day to come this season. Tomlin is building a foundation on the offensive line, it could take a year or two to develop.

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