Paulie Malignaggi has concussion

Former two-division titleholder and Showtime boxing analyst Paulie Malignaggi, who got knocked out in the fourth round of a brutally one-sided fight against welterweight titleholder Shawn Porter last Saturday in Washington, D.C., suffered a concussion.

As a result, Malignaggi, who underwent tests and stayed overnight at a D.C., hospital after the fight as a precaution, will sit out Saturday night's Showtime tripleheader telecast at the StubHub Center in Carson, Calif., as he is not ready to travel yet.

Middleweight contender Daniel Jacobs, who filled in on last week's broadcast because Malignaggi was on the card, will fill in again this week, Showtime announced on Thursday.

"I am feeling very good at this stage, but anytime you have any level of concussion, your best bet is to fully recover before doing virtually any activity," Malignaggi said in a statement. "There will be plenty of action on Saturday and the audience will be in good hands with Danny on the stick. But make no mistake: I will not miss next week's (Floyd Mayweather-Marcos Maidana Showtime PPV) event in Las Vegas. I have been looking forward to that fight card for some time. I'll be ready."

Jacobs received many excellent reviews for his work last week, the first time he has done extensive commentary.

"I had a great time filling in for Paulie last week," Jacobs said. "It was a tremendous honor to be part of that event and to show the fans a different side of myself. I received terrific feedback, not only from Showtime, but from the fans, my friends and family. Obviously, Paulie's welfare is my main concern but I know he will be back behind the mic soon. In the meantime, I look forward to doing another great job at ringside."

On Saturday's card (Showtime, 9:30 ET/PT), interim welterweight titlist Keith Thurman faces Julio Diaz in the main event, with junior welterweight contender Lucas Matthysse facing John Molina in the co-feature and lightweight titlist Omar Figueroa defending against Jerry Belmontes in the opener.