If you plan on watching Penn State's contest with Iowa this Saturday, you better grab a team roster before you turn on the tube.

Judging by coach Joe Paterno's demeanor and remarks after his team's dismal 18-6 loss to Wisconsin three days ago, the 74-year-old coach could be making wholesale changes everywhere.

Offense. Defense. Even special teams.

Paterno said certain players aren't playing up to their ability and haven't displayed the passion or emotion that has always been associated with Penn State football. While Paterno didn't name specific names, this much is clear: nobody's position on the depth chart is safe right now. That includes the quarterbacks.

For the second straight week, Matt Senneca struggled mightily after completing just 3 of 11 passes for 64 yards. Second-teamer Zack Mills, who played quite well against Miami, didn't fare much better. The redshirt freshman hit on three of eight attempts for 44 yards and one interception.

It didn't help though that the Nittany Lions' sieve-like offensive line gave up eight sacks to the Badgers, one week after giving up six to the Hurricanes.

But Senneca isn't ready to point the finger at his bodyguards yet.

"I feel safe behind them," Senneca said. "They're good guys. I have confidence in them. I don't go out there thinking, 'Oh my God, I'm going to get killed this game.' "

Both signal callers agree that Paterno's willingness to play two quarterbacks is not detrimental to the team.

"I told Zack after he came out after his first series that there's going to be no ill feelings between me and you," Senneca said. "I don't care if we split time the whole season as long as we start winning. That's really the only thing that matters. If both of us can help the team win, then that's what we have to do."

Like the competitors they are, both quarterbacks want to play and get the majority of the snaps. That has to increase the intensity of competition in practice.

Yet, Mills said the battle for the top spot has not put a strain on his relationship with Senneca.

"There's nothing between us," Mills said. "We just want to win. That's all we want to do. Whoever's in there, we just want to take the team down the field."

But flip-flopping between signal-callers — especially two that are as different as Senneca and Mills — could possibly disrupt the flow of the offense.

Senneca is more of a drop-back quarterback who relies on a precision passing game that needs to be coupled with sharp receiver routes. He's right-handed.

Mills, though, is more of a freelancer who appears like he can make something out of nothing. He doesn't seem to need the structured system that his older partner does. And he's left-handed.

Those are some disparaging differences, but others on the Penn State offense say it doesn't matter which guy is in, the plays still run the same way.

"We practice with both Matt and Zack," tailback Larry Johnson said. "They get equal amount of work at practice so in a game situation Matt can come in or Zack. I don't think it changes the chemistry."

But right now, it doesn't seem to matter who's running this offense. It's apparent the Nittany Lions can't run or pass. Sometimes this season, it's appeared that the only way they could gain yardage is when the opposing defense got penalized.

So who will Nittany Lion fans see at the helm on Saturday? Who knows. Maybe that glimpse of the option in the first half is a sign that Paterno is gearing up to get true freshman Michael Robinson — who's a tremendous athlete — ready for action.

Right now though, Paterno doesn't even know. When asked after the game if Senneca is still the starter, all the old coach could do was stare blankly and shake his head.

"I haven't got the slightest idea," he said.