"If he wants to get kicked out of the game in the second quarter, I think he should," Ryan said Friday.
Marshall, upset about the Dolphins' 0-4 start this season, said he wasn't playing with enough passion, which is why he planned to get kicked out in the second quarter of Monday night's game against the Jets.
"I'm not joking. I'm serious," Marshall told the South Florida Sun-Sentinel. "They're going to fine me. It's probably going to be like a $50,000 fine. But that quarter and a half that I'm out there, I'm going to play like a monster."
"I might get in a fight with Bart Scott. (Antonio) Cromartie, we pretty much matured our relationship and grew a little bit," he said. "We used to fight in Denver and San Diego. If that happens, it happens, so we'll see."
Dolphins coach Tony Sparano tried to downplay Marshall's comments.
"Obviously, Brandon was 50 percent kidding," Sparano said Thursday. "I know one thing about that guy: He's not going to do anything to hurt this football team. I know the people in that locker room are important to him, and this guy has worked really hard."
Asked about Marshall's comments on Friday, Cromartie said he "doesn't really care."
"I already know what type of guy he is. I mean he's a front-runner," said Cromartie, adding that he and Marshall have been friends since the Jets cornerback's senior year in high school. "But they gotta win one game first before they can start talking."
Cromartie, who will be facing Marshall for the 11th time in his career, says Marshall is "all talk."
"He's gotta give [you all] something to write about because there's no talk going on down there because they're 0-4," Cromartie said.
Ryan said he's just happy Marshall called out Scott and Cromartie instead of him.
"I'm just happy that he's not picking on me to fight him," Ryan said.
"We had that issue before," Ryan said, referring to when Dolphins linebacker Channing Crowder threatened him in 2009. "And quite honestly I was a little nervous running across that field. So I feel good, at least he never called me out."
Scott wasn't in the locker room during media availability, but defensive coordinator Mike Pettine laughed when asked about Marshall's fightin' words.
"I shook my head when I saw that one," Pettine said with a grin. "As long as it's not a 1-for-1 trade, he can go right ahead."
Mike Mazzeo is a frequent contributor to ESPNNewYork.com. Information from The Associated Press was used in this report.