You've conflated them. Two different guys.
Lawrence Eugene Andersen - with an "E" - is the long-time reliever once dealt for Jeff Bagwell and more recently a Phillies announcer:
Larry Andersen Statistics and History | Baseball-Reference.com
Lawrence Dennis Anderson - with an "O" - is pictured with Thetford Mines. He would pitch for Milwaukee later in that 1975 season:
Larry Anderson Statistics and History | Baseball-Reference.com