James Thompson "Tommy" Prothro, Jr. (July 20, 1920 – May 14, 1995) was an American football coach. He was the head coach at Oregon State University from 1955 to 1964 and UCLA from 1965 to 1970, compiling a career college football record of 104–55–5 (.634). Prothro moved to the professional ranks in the NFL in 1971 as head coach of the Los Angeles Rams for two seasons and the San Diego Chargers from 1974 to 1978, tallying a career mark of 35–51–2 (.409). He was inducted into the College Football Hall of Fame as a coach in 1991. A Southerner from Memphis, Tennessee, he spent most of his coaching career on the West Coast.