Billy Beane would be thrilled with a 3-for-8 outing. Kliff Kingsbury will need more.

Kyler Murray, the former first-round baseball pick whose Heisman Trophy campaign turned him into the No. 1 pick in the 2019 NFL Draft, had a dreadful second preseason start Thursday night, completing just 3-of-8 passes for 12 yards while failing to lead the Cardinals to a score on four possessions, before exiting with Arizona trailing the Raiders 26-0 in the second quarter.

The dual-threat rookie now has a 67.6 passer rating through two games, having gone 9-of-15 for 56 yards while being limited to one rushing attempt for four yards.

“We didn’t look as good as we would like to look, but it’s the preseason and this is why it’s the preseason,” Murray said after the game. “It’s tough because we’re not playing the whole game. I don’t want to say it’s not real, but it’s not the regular season and we’re not doing everything that we’re going to do.

“It gets frustrating, but it’s the preseason. We got to be better. Looking at the big picture, this isn’t a big deal.”

Projecting what Murray’s performance means for his first NFL season is pointless, but trouble is already emerging in front of the undersized quarterback.

An offensive line ranked 25th last season by Football Outsiders — which led the league in sacks allowed less than 2.5 seconds after the snap (17), per NFL Network — has the potential to ruin the rookie season of Arizona’s first-round quarterback selection for the second straight year. Murray, who sent Josh Rosen packing for Miami, has been sacked three times on six possessions in the preseason.

Murray didn’t help himself much Thursday, getting whistled twice for a false start. Though the penalty is rarely called on quarterbacks, Murray was flagged for a snap clap deemed too abrupt.

“To me, it’s like any other hard count,” Murray said. “It’s the defense’s job to watch the ball. So it really doesn’t make sense to me, but we’re trying to fix things out right now.”

Kingsbury, a rookie NFL coach, has already begun discussions with officials and the league regarding Murray’s clapping and his fast-paced offense.

“It’s the first time for certain officials to see it,” Kingsbury said. “We’ve been in contact with the league and have had great conversations on it. We’re going to work through that and make sure everybody is on the same page. We want to be on the same page with them, and make sure we’re doing things that they deem legal.”