Detroit Lions RB D’Andre Swift could serve as a complementary back to free agent-acquisition Jamaal Williams, according to comments made by new offensive coordinator in a recent interview with The Athletic. ‘Jamaal is what I’d call a classic ‘A’ back,’ Lynn said. ‘I like to break the backs down into A and B. My ‘A’ backs are normally my bigger backs. They can run between the tackles, block probably a little better than a ‘B’ back, they can also run the perimeter. I can leave those guys in there for all three downs. My ‘B’ back comes in, he’s a guy that sometimes I want to use in space more. He’s my speed-in-space guy. ‘