If you've been watching the Olympic coverage and noticed that Bob Costas' right eye was getting worse and not better (he mentioned during the Opening Ceremony last Friday that he had contracted an eye infection), you're not the only one-- his bosses at NBC apparently did,

too.

And, to help his ailing eyes heal faster, they've asked Matt Lauer to fill in during Tuesday night's primetime Olympic coverage on NBC.

On the Today show Tuesday, the two hosts talked about the temporary fill-in.

"Reluctantly, I was trying to throw a complete game here, but I think we're going to have to go to the bullpen, and I don't know if you're aware of this or not, but you're Mariano Rivera, at least tonight,'' Costas told Lauer by phone live on TODAY Tuesday. "Let's hope it's only tonight. I'm walking around, I might as well be playing 'Marco Polo.' I have no idea where I am.''

"I just feel bad for him,'' Lauer told TODAY.com. "He looks forward to these Games for so long, and he's the best that's ever done it. If he could be in that seat, he'd be in that seat."

TODAY.com went on to say how Costas was a good sport about his eye issues Monday night when he went to toast a vodka drink with NBC analyst Mary Carillo.

"I'm not really that much of a vodka guy,'' Costas told Carillo. "I'm looking at it this way, though. My eyes can't get any redder, no matter what I do."

"By the way, I will be doing the shots of vodka starting in about 15 minutes,'' Lauer joked on Tuesday after learning he would fill in.