EAST RUTHERFORD, N.J. — The New York Giants’ defense has hit rock bottom, at least for now.

It allowed four passes of 35 yards or more, two runs in excess of 20 yards, and 473 total yards in an awful 51-17 loss to the surprising Los Angeles Rams on Sunday.

The loss was their worst at home since a 52-21 setback to Cleveland ended the 1964 season, in which they went 2-10-2.

“When you tackle the way we tackled today, and we had a blocked punt, unfortunately that’s what the scoreboard is going to look like,” Giants Coach Ben McAdoo said of his 1-7 squad.

Jared Goff threw for career bests of four touchdowns and 311 yards in torching a defense without cornerback Janoris Jenkins, who McAdoo suspended Tuesday after he failed to report back from last week’s bye on time. The Giants were also missing end Olivier Vernon and linebackers Jonathan Casillas and B.J. Goodson.

The defense looked disorganized and confused at times. Nothing better illustrated that than the Rams’ second touchdown that put them up 17-7 in the second quarter. Faced with third-and-33, Goff completed a screen pass to Robert Woods, who took one cut upfield and left cornerback Eli Apple and safety Landon Collins standing in their tracks as he flew 52 yards for a touchdown.

McAdoo said it was unforgivable.

“That was a quick screen to the slot receiver,” he said. “You can’t let him run for a touchdown in that situation. We have to address it. We have to get it fixed.”

Eli Manning threw two touchdown passes and became the seventh NFL quarterback to reach the 50,000-yard mark, but the Giants committed three turnovers.