The Grinnell men’s basketball team is enjoying its first ever ranking on the heels of a 12-0 start. “D-Three Hoops dot com” has the Pioneers ranked 21st in their latest poll. Coach Dave Arsenault’s team is one of five unbeatens in Division three men’s basketball.They begin a three game road stretch tonight with Knox College, a team he says could pose problems for their high-scoring long-range offense. He says Knox plays with three guards, which makes it tougher on their offense, which can exploit big men inside.Grinnell will have to play without third leading scorer Ken Heiser, who is out with a foot injury.