"He's going to sign with Baylor on Wednesday," said James Willians, Porter's coach at Thurgood Marshall.
The 6-foot-5, 284-pound tackle originally committed to the Red Raiders on July 6, 2012. He took an official visit to Baylor on the weekend of Jan. 18 and most recently took a weekend visit to Louisiana Tech.
Williams said Baylor is getting a heady player in Porter, who was recruited by Kendal Briles and Randy Clements.
"He wanted to know everything about the game," Williams said. "He was really a student of the game and wanted to know why everything worked, why we did this or that. He asked a lot of questions and he's one of those types of guys that wanted to know everything that was going on around him."
Porter will join his high school teammate and fellow offensive lineman Darius Moore as a Bears signee. Moore is a three-star guard.
"Those guys are excited to go there and play together and they're really looking forward to continuing to have success at the next level," Williams said. "They were two of the big reasons we had the success we did at Marshall."
Williams said Moore's college choice played a role in Porter's decision.
"That played a role there a little bit," he said. "The fact that the coaching staff that recruited him initially from Texas Tech left, that kind of opened things up. ... With them having a new staff, that made him want to look at other options."
Moore has all the tools needed to succeed at the next level, Williams said.
"His size you can't deny," Williams said. "His movement is very, very good. But again, he's just scratching the surface. He's just learning how to play at tackle in a spread system like we're using, so his ceiling is very high.
"I think he'll be great. I think he has a great future. He's really committed, he has a passion about it and he works hard."