Cleveland.com's Mary Kay Cabot tweeted Rosenhaus' full statement:
Also, Njoku tweeted, "I'm all in Cleveland. Time to work."
Last month, Rosenhaus told ESPN's Adam Schefter, "It is in David's best interest to find a new team at this time," after the Browns signed tight end Austin Hooper to a big contract in free agency.
The Hooper deal is worth $42 million over four years with a $10 million signing bonus and $23 million in guaranteed money.