Eddie Lacy reminisces about this one specific off-day in Tuscaloosa with pride. With that jovial laugh.

In college, he once slept for an entire day. Twenty-four hours straight. Well, OK, the Alabama running back did brush his eyes off for a meal and go to the bathroom. Other than that? Out cold.

A glorious day, indeed.

"I just like to sleep," Lacy said. "I'm a sleeper, man."

This is the player who will now carry the load on offense for the Green Bay Packers. A mashing, bashing "hammer" running the ball, the rookie has a very non-bashing personality. The Louisiana native is as laid-back as athletes come.

All players talk about flipping the switch, about being chill off the field and a maniac on it. But this 5-foot-11, 230-pound lead back has mastered the Jekyll-and-Hyde balance.

There are two Lacys. The one who values the power of a nap, who just finished the new "Grand Theft Auto" video game in two stinking weeks. And there's the one steam-rolling through defenders for 596 yards on 134 bruising attempts with four touchdowns.

"Even still to this day, I've never been able to figure that out," Lacy said. "To me, my on the field and off the field, I'm literally the same person. But..."

He pauses for a few seconds. He's baffled.

"I don't know. It's like I'm not the same person at all. Sometimes I watch myself and I can't believe that's me, that I'm doing that."

Take Lacy's 56-yard run in Monday night's loss to the Chicago Bears. Lacy bolted through an open hole, dusted off safety Chris Conte and was a one-man locomotive up the sideline. Or take the 2-yarder that ruptured to 18 yards. Lacy embarrassed the 300-pound Stephen Paea at the line and then carried Charles Tillman on his back. For 10-plus yards, Tillman was a toddler clinging to Uncle Eddie's back for a joyride.

In this game, coaches said, Lacy elevated his game to a different level. Now — through this Aaron Rodgers-less disaster plan — the Packers need more of it.

"The longer the game went on, the stronger he got as far as breaking tackles," running backs coach Alex Van Pelt said. "Obviously, he's a good runner. But he was doing some good stuff out there that he can build on. I wouldn't be mad if he just took that approach into every game. Try to take it upon his shoulders to make the plays because he's capable."

"It's more mental. I think sometimes you know guys are counting on you and it kind of gets you fired up internally. That's what I saw in his style of running."

And this contrasts sharply to the "laid-back" Lacy that Van Pelt sees daily around the facility. Inside this hallway, Van Pelt imitates Lacy's low, scratchy voice. Many times, he'll instruct Lacy to do something and in that Cajun drawl, Lacy responds, "I got it, Coach," Van Pelt said. Nothing more. At first, the coach was skeptical. Did Lacy really get it?

Yet he always does. He has grown into a 4WD, three-down back for all situations.