Breaking down the Ohio State roster as training camp winds down and the program turns its attention to the opener on Aug. 31 against Buffalo.

DEFENSIVE LINE

Top of the depth chart: Adolphus Washington and Noah Spence at end with Michael Bennett and Joel Hale on the interior

Next in line: Ankle injuries in spring practice kept Tommy Schutt from making it a three-man rotation in the middle, but he is healthy now and pushing for work at tackle along with the more veteran starters. Chris Carter isn’t exactly slim and probably never will be, but he has shed some weight and could be a valuable run-stopper when the situation is right. Rashad Frazier has emerged as a viable option at end, and the transition of Jamal Marcus from linebacker a year ago to pass-rushing threat on the edge has apparently been a success as he and Steve Miller offer two more useful bodies off the bench.

New faces: For all of Urban Meyer’s history on offense, he long has made an emphasis on stocking his team with athletes on the defensive line capable of wreaking havoc on opposing quarterbacks. After losing all four starters from the 2012 line, the Buckeyes were perhaps more intent than usual on stocking up for the future in the trenches, and freshmen such as Joey Bosa, Michael Hill, Tracy Sprinkle and Tyquan Lewis all could play a role in the rebuilding of the unit as early as this season.

Recruiting trail: Even with all four projected starters set to return after this season, the focus on finding more potential game-changers up front hasn’t changed at all for Meyer. The class of commits already includes a pair of linemen, including ESPN300 end Jalyn Holmes (Norfolk, Va./Lake Taylor), a versatile athlete who checks in at 6-foot-5 and has enough mobility to play on either side of the ball potentially.

Flexibility: The plan heading into the season is to rotate through about eight guys up front, which wasn’t something the Buckeyes ever could really do a year ago while still easing Spence and Washington into the mix during their first seasons on campus. Ohio State can’t lean on a group of veterans to carry the load this time, though, and the development of the second unit could be critical as the season progresses. There’s no real question about who the starters are, but for all the talent Spence and Washington bring to the lineup, this will still be their first full year in the Big Ten grind as regulars.

Notable numbers:

• Despite his relatively limited role a year ago, Washington’s three sacks represent the highest returning total among linemen. John Simon’s nine takedowns led the team, and linebacker Ryan Shazier finished second with five -- so the Buckeyes are certainly looking for more individual production from the next wave up front.

• Bennett appeared in only eight games and chipped in just 11 tackles due to a nagging groin injury, but before his health became a concern, the Buckeyes had big plans for him as a sophomore with Meyer labeling him as one of his top four linemen. Ohio State will need him to live up to that billing on the inside this fall.

Big question: How good can the super sophomores be?

There may have been some uncertainty heading to spring practice as the Ohio State staff faced the daunting task of replacing six starters in the front seven -- including the entire defensive line. But it didn’t take long for Spence and Washington to start easing some minds and allowing the coaches to get some sleep. The two are freakishly talented and perfect complements to each other, with Spence a speedy blur off the edge and Washington a powerful force capable of bulling over blockers on the way to the quarterback. Neither has been called on for regular work over a complete season at this level, though, so despite the high expectations, there’s still plenty left to prove on the field. The way the two of them hold up physically as they tap into that enormous potential will be critical in determining just how much of a threat the Buckeyes can pose to opposing offenses this season.