James Layng Martine Jr. (born March, 1942) is an American songwriter whose compositions have appeared on the country and pop music charts over a four-decade span beginning in the late 1960s.

Some of Martine's writing credits include Elvis Presley's million-selling "Way Down"; The Pointer Sisters' "Should I Do It" and Trisha Yearwood's "I Wanna Go Too Far".

After writing his first song, he had the temerity to look up established record publishers in the New York phone book, take a subway from school to visit them, and present himself unannounced.

Martine's song "Rub It In", a number one country hit for Billy "Crash" Craddock in 1974, became a long-running TV commercial called "Plug It In"[2] for SC Johnson's Glade Plug-ins air freshening product.

[9] The younger Martine, of a different generation, chose songs written by his father over various decades and gave them an updated "roots rock sound".