Rodney Childers is the new crew chief for Corey LaJoie, and his lifelong friend, Mark Martin, just reacted to the news. On X, Martin expressed his excitement to see Childers becoming the crew chief for the No. 7 Chevrolet. “I’m excited to see Rodney Childers and Corey LaJoie team up,” Martin wrote. “They will make a great team.” Childers was Martin’s crew chief when they both worked for Michael Waltrip Racing in 2012 and 2013. In a 2021 interview, Childers talked about how much he enjoyed working with Martin. “The first time I got to sit down with him and talk to him. It didn’t take me long to…