"After four or five plays, it was like riding a bike," Leftwich said. "I took a few hits. I hadn't hit the ground in a while. It was a whole lot of things I hadn't done in a while. It was good."
Even if Roethlisberger was not. Tackle Max Starks didn't think the notoriously gritty Roethlisberger was in any real danger when he stood up after getting sandwiched between Tamba Hali and Justin Houston.
"It didn't seem like a tough hit ... but he came to the sideline and next thing you know he was gone," Starks said. "I'm hoping it was nothing serious. Honestly, it didn't seem like it."
While the Steelers ponder their postseason prospects with Roethlisberger uncertain, the Chiefs (1-8) are simply wondering when they're going to win another game.
Jamaal Charles ran for 100 yards and a score but couldn't stop Kansas City from dropping its sixth straight.
The Chiefs had their chances, taking their first lead in regulation all season in the first half then overcoming a series of embarrassing miscues to tie the game at 13 at the end of regulation.
Taking over at the Kansas City 20 with 1:51 remaining, Cassel led the Chiefs 52 yards — converting a fourth-and-15 in the process — to set up a 46-yard field goal by Ryan Succop as time expired.
"I thought our guys played and competed all night long," Cassel said. "We went up against a good football team and unfortunately we weren't able to pull it out in the end, but I thought the way the guys handled the environment of 'Monday Night Football' was great."
Kansas City's only other victory this season came in overtime, a stunning upset in New Orleans in September. Any chance at a repeat faded when Cassel's pass on the second play of extra period landed in the hands of Timmons, who returned it 23 yards to set up Suisham's second game-winning field goal of the season.