Beckham would even say he obsesses over it throughout the next week, until he gets on the field for another game.
"I have trouble just moving on," Beckham said Wednesday, three days after dropping a pair of passes in a win over the Dallas Cowboys. "I'm pretty obsessive on at least that area of the game. So it definitely bothers me whenever you drop a pass.
"But I'm sure it wasn't the first. I'm sure it won't be the last."
Beckham dropped a first-quarter pass that would've gone for a touchdown and third-down pass deep in Dallas territory in the third quarter. Two offensive plays after his second drop, Beckham took a slant and raced 61 yards for a touchdown.
"The biggest thing from a drop is you have to rebound from a drop," coach Ben McAdoo said. "Learn from it and rebound. He did it on Sunday."
Beckham said after the game that he would spend extra time this week catching balls on the JUGS machine. He has done that. He also has gone back and analyzed the drops.
It's all part of his weekly self-assessment.
"Just dropped it," he said of the perfectly placed first-quarter pass by quarterback Eli Manning down the right sideline. "Trying to find the ball and found it late and tried to cradle it in instead of catching it how I'd usually catch it. It just got up on me.
"The second one I was just trying to make a play. The ball kind of felt slick and I just tried to squeeze it and it just shot out of my hands. You can't really worry about it. I've dropped a pass before. It's not the end of the world for me. It doesn't break my confidence any. It's not going to deter me from doing what I'm capable of doing. I just don't want to have them. I don't want to have any more drops."
The Pro Bowl receiver wouldn't use his thumb as an excuse, but when pressed on the issue he conceded it still bothered him. Beckham injured his thumb several weeks back when he scraped it across the turf against the Bears, and even left a game in Cleveland to have it checked.
"It's tough. It's a line between wanting to get better and also trying to protect that thumb for right now, just because you can't be taking too much contact to it until it's really game time. Just trying to find a way," Beckham said. "It's only when it's contact or when I try to grab somebody. It's not like it's a regular finger. It's a thumb. It's the most important one you have.
"It's definitely difficult. I dealt with it before. I'm sure it will happen again. You kind of have to play through it and rub some dirt on it."
Beckham leads the Giants with 79 catches for 1,109 yards and nine touchdowns. The Giants (9-4) have three key games remaining and potentially the playoffs.