If memory serves me well.In the 1970 Nfc championship game ,held at Kezar stadium.Craig Morton was replaced by Roger Staubach who promptly threw a interception.The 49er db who intercepted it was cruising down the sidelines for an easy score. Craig Morton stuck his foot out and tripped him.He got a 15 yard penalty but the niners didn't get the td. Niner's lost by 3.That was the end of it.No other action was taken.