The duo has started all three games at free safety and strong safety, respectively.
"They're really starting to do some things and play well," Holliday said. "They're starting to feel comfortable."
LeGrande is the team's leading tackler with 34, including one tackle for loss and a pass breakup, while Okoroha is fourth with 22 tackles. Okoroha said he and LeGrande also feel like they're meshing well.
"Right now things are going really well," he said. "As a defense, we all as a team are starting to come together. It's amazing to see how everything's starting to come together, and we just have to build on that and keep going up.
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THE HERD faces its third straight mobile quarterback when it travels to Rice on Saturday.
Kickoff is set for 3:30 p.m.
Marshall lined up against Western Carolina's Eddie Sullivan and Ohio's Tyler Tettleton, but Holliday said Rice's Taylor McHargue is a little different, especially compared to Tettleton.
"Especially in the passing game, he's not afraid to pull it down and run with it," he said. "Where Tettleton was more apt to throw the ball and make plays on the perimeter, this guy will take it vertical and does a good job of rushing the football."
McHargue leads the team with four rushing touchdowns and is second with 206 rushing yards.
Contact sportswriter Derek Redd at derek.r...@dailymail.com or 304-348-1712. His blog is at blogs.dailymail.com/marshall.