In the eight years that tackle Michael Roos has started for the Titans, the rate of change on the offensive line could best be described as intermittent.

Tackle David Stewart has started for seven straight years on the right side, and three other players — Kevin Mawae, Jake Scott and Eugene Amano — started for stretches of four consecutive years during that time.

All of which makes what the Titans have done this offseason — signing three veteran offensive linemen and then picking a guard and a center in the first four rounds of the draft — even more eye-opening.

“It’s definitely different,” Roos said during a Titans Caravan stop Wednesday. “For so long, it’s been a pretty steady group of guys, maybe a couple of guys coming in here and there. We finally had to overhaul it kind of the same way it was (in 2005) when me and (Stewart) got drafted. …

“It’s been eight years since it last happened, and that’s a good amount of time. It was time for it now.”

The big moves began in free agency when the Titans signed guard Andy Levitre, considered the top offensive lineman on the market, and followed with versatile guard/centers in Rob Turner and Chris Spencer.

In the draft last weekend, the Titans grabbed Alabama guard Chance Warmack in the first round and California center Brian Schwenke in the fourth.

The selection of Warmack marked the first time the Titans had taken an offensive lineman in their first five picks since 2007 (Leroy Harris). The drafting of Warmack and Schwenke marked the first time since 1993 that the Titans used two of their first five picks on offensive linemen.

“At the very least, it will create really good competition at all the positions and ensure that the best five will be playing and the best six through eight or nine are (in the lineup),” Roos said. “I think it will be good for everyone to get a wake-up call and work that much harder to make sure you have a spot.”

An injury-plagued line finished last season with the following starting five: Roos, left guard Fernando Velasco, center Kyle DeVan, right guard Deuce Lutui and right tackle Byron Stingily. But the projected starting unit at this point would be Roos, Levitre, Velasco, Warmack and Stewart.

Warmack would become the first rookie offensive lineman to start right away for the Titans since Roos in 2005.

“The biggest thing there would be just not to over-think it,” Roos said. “You kind of have to adapt and just go with the flow. You can’t really think about the fact you have to jump in (to the starting lineup). You just come out there and start working, and try to meld with the guys as best you can.”