Clemson football Coach Ken Hatfield, upset by...

Clemson football Coach Ken Hatfield, upset by the behavior of some of his players, has given his team a written code of conduct.

Hatfield asked the players to study and sign the guidelines or leave the team.

The move to put the team rules in writing was “prompted by the whole season,” said Hatfield, whose team finished 9-2-1 after losing to California in the Citrus Bowl, 37-13.

Defensive lineman Brentson Buckner was thrown out of the Citrus Bowl for punching Cal quarterback Mike Pawlawski while he was on the ground after a tackle, and there was an incident involving senior linebacker Ed McDaniel, who used profanity at a public pep rally the night before the game in Orlando, Fla.