While optimism runs high at most every college football program this time of year, even the rosiest picture has some lurking shadows. That is true even for the 25 teams in our post-spring Power Rankings. No matter how deep the rosters seem, everyone has some question marks or potential weak spots. Our college football reporters take a look at the biggest areas of concern for each of the top teams, the potential Achilles' heel that could keep them from reaching their goals for the season.

1. Penn State Nittany Lions

Area of concern: Wide receiver The Nittany Lions addressed the wide receiver spot in the portal with Syracuse's Trebor Pena and others, but until they actually elevate their production, questions will linger. Penn State has had only one wide receiver rank among the top 10 in the Big Ten in receiving in the past three seasons (Tyler Warren played tight end). Both Warren and top receiver Harrison Wallace III are gone, and Penn State needs its portal haul -- Pena, a second-team All-ACC wideout in 2024, as well as Devonte Ross (Troy) and Kyron Hudson (USC) -- to give quarterback Drew Allar enough capable targets this fall. Although Allar's big-game struggles are also concerning, he hasn't had a great group of receivers at his disposal during his Penn State career. -- Adam Rittenberg

2. Clemson Tigers

Area of concern: Running back The position group that has been discussed more than any other since the spring at Clemson is running back -- the only position on offense that loses the bulk of its production with Phil Mafah off to the NFL. But the Tigers have plenty of depth at running back, and that should help ease any concerns as they move into fall camp. Particularly because running back traditionally has been an area where Clemson has excelled, even when other groups on offense took a step back. (Clemson has had a 1,000-yard rusher 11 of the past 16 years, and that does not include 2023, when Mafah and Will Shipley split the carries nearly evenly and combined for more than 1,700 yards.) It is easy to see true freshman Gideon Davidson as a breakout player, considering the success Clemson has had with true freshman backs since Dabo Swinney arrived. Clemson also has receiver Adam Randall taking reps at running back to help round out the depth in a room that also features Keith Adams Jr. and David Eziomume. Jay Haynes continues to rehab a knee injury. -- Andrea Adelson

3. Texas Longhorns

Area of concern: Offensive line The Longhorns lost four starters on the O-line to the NFL draft and are breaking in a new quarterback, although Arch Manning made two starts last season, as well as several key receivers with the losses of Matthew Golden, Isaiah Bond and tight end Gunnar Helm. They lost tackle Kelvin Banks Jr., the 2025 No. 9 draft pick, but Trevor Goosby got some key playing time last year at the position when Banks was injured. The Longhorns also lost 56-game starter Jake Majors at center and face Ohio State in Week 1, posing a quick learning curve for an almost completely new offensive line group. -- Dave Wilson

4. Georgia Bulldogs

Area of concern: Pass rush The Bulldogs lost six veteran contributors on their front seven on defense, none more important than edge rushers Jalon Walker, Mykel Williams and Chaz Chambliss. Walker and Williams were first-round picks in the NFL draft, and Chambliss was an unheralded contributor over four seasons. They combined for 18 sacks and 28.5 tackles for loss in 2024. Making matters worse, Damon Wilson, a projected replacement on the edge, transferred to Missouri. Georgia feels good about Gabe Harris Jr., and it added Army transfer Elo Modozie, who had 6.5 sacks for the Black Knights last season. -- Mark Schlabach

5. Ohio State Buckeyes

Area of concern: Quarterback Quarterback Will Howard was everything the Buckeyes could have hoped for last year in his lone season at Ohio State. He was spectacular during the College Football Playoff, posting a QBR of 97.2 over four games during the Buckeyes' march to the national championship. With Howard now in the NFL, the Buckeyes will be turning to either former five-star freshman Julian Sayin or Lincoln Kienholz this season, pending who wins the job during camp. Throwing to all-world wideout Jeremiah Smith will bolster whomever the starting quarterback winds up being. But even with Smith and All-American safety Caleb Downs anchoring each side of the ball, it's difficult envisioning the Buckeyes truly contending again unless Ohio State gets good-to-great quarterback play like it did last season. -- Jake Trotter

6. LSU Tigers

Area of concern: Offensive line I don't know that LSU has to necessarily worry about the offensive line because of moves made this offseason, but it has to be something to keep an eye on just because of the magnitude of the losses. The Tigers had one of the best tackle duos in all of college football last season in Will Campbell and Emery Jones, who were first- and third-round NFL draft picks. They lost four starters across the line in total. DJ Chester and Tyree Adams are back in different spots, while Brian Kelly added Braelin Moore from Virginia Tech. -- Harry Lyles Jr.

7. Notre Dame Fighting Irish

Area of concern: Tight end Since 2011, the Fighting Irish have had a whopping 10 tight ends selected in the NFL draft, including last season's leading receiver, Mitchell Evans, who had 43 catches for 421 yards with three touchdowns. While the Irish feel they've upgraded their wide receiver group with the additions of Virginia transfer Malachi Fields and Wisconsin's Will Pauling, tight end remains a bit of a question mark heading into preseason camp. Senior Eli Raridon has the size (6-foot-7) and hands to excel at the position, but he was plagued by injuries during his first couple of college seasons, after tearing an ACL as a freshman. He had 11 catches for 90 yards with two touchdowns in 2024. The status of another tight end, Cooper Flanagan, who tore his left Achilles tendon in the Sugar Bowl, is in question. -- Mark Schlabach

8. Oregon Ducks

Area of concern: Defensive line It's hard to say whether this is an area of concern just yet, but there are question marks with Oregon's defensive line as the Ducks lost both Derrick Harmon and Jordan Burch from last year (as well as Jamaree Caldwell). Defensive end is a strength with Matayo Uiagalelei holding down the edge, but the rest of the line will require some newcomers to step up, such as USC transfer Bear Alexander and rising lineman Aydin Breland, who could be in line for a breakout season. A'mauri Washington, one of the few returning players, will likely be a fixture of the new-look line as well. -- Paolo Uggetti

9. Alabama Crimson Tide

Area of concern: Pass rush Alabama finished 13th in the SEC last season in quarterback sacks, and while sacks aren't the end-all when it comes to rushing the passer, the Crimson Tide need to be more consistent in getting to the opposing quarterback. There's not a pure edge pass rusher in the mold of Will Anderson Jr. or Dallas Turner on this roster, meaning Alabama will need to get more pressure from its interior linemen and perhaps a breakout season from redshirt sophomore outside linebacker Qua Russaw. -- Chris Low

10. BYU Cougars

Area of concern: Quarterback When the season ended, quarterback figured to be an obvious strength for BYU considering Jake Retzlaff was set to return. But with him expected to transfer as of late June, the Cougars are left without an established starter. McCae Hillstead showed flashes at Utah State in 2023, Treyson Bourguet started eight games in two years for Western Michigan and true freshman Bear Bachmeier was a big-time recruit who enrolled briefly at Stanford earlier this offseason before leaving for Provo. The expectation is that all three will have a chance to earn the starting job in fall camp, without a clear-cut front-runner. -- Kyle Bonagura