Ravens' John Harbaugh says NFL catch rule 'as clear as mud'

OWINGS MILLS, Md. -- Baltimore Ravens coach John Harbaugh wants more clarification to the NFL's catch rule after Isaiah Likely 's go-ahead touchdown was overturned in Sunday's 27-22 loss to the Pittsburgh Steelers .

"It's about as clear as mud right now," Harbaugh said Monday. "That's how I feel about it."

The referees initially ruled Likely scored on a 13-yard pass from Lamar Jackson -- which would have given the Ravens a one-point lead with 2:43 remaining -- despite the tight end losing the ball in the end zone.

But less than a minute later, referee Alex Moore announced that it was an incompletion. Likely had the ball punched out by Steelers cornerback Joey Porter Jr . before he made a third step in the end zone. NFL vice president of instant replay Mark Butterworth explai