"Knowing they were struggling [with injuries] in the secondary, personally I would've loved to attack them," Beckham said after the game, per SNY's Ralph Vacchiano. "But that wasn't in our game plan."
Beckham elaborated on his comments, per Vacchiano: "They came out and made their adjustments, and they just made better adjustments than we did. They ran better plays. They made the plays."
The Eagles listed four cornerbacks on their Week 12 injury report: Rasul Douglas, Sidney Jones, Avonte Maddox and Jalen Mills. Douglas was the only one of the four who was active, and he carried knee and ankle injuries into the game.
Philadelphia was also without Ronald Darby after placing him on injured reserve earlier this month.
Eli Manning threw for 297 yards, one touchdown and an interception against the Eagles' makeshift secondary. While those numbers aren't necessarily bad, Beckham's criticism has merit.
Manning averaged eight yards per attempt, so he wasn't challenging Philadelphia's defense deep with any regularity. He also targeted Beckham nine times, with Beckham catching five passes for 85 yards.
Beckham told reporters after the game his calf was cramping up, which caused him to miss New York's first drive of the second half. He downplayed the idea the cramping limited what he could do on the field, though.
The 26-year-old is one of the best pass-catchers in the NFL. Even if he's not quite at 100 percent, targeting him only nine times against an injury-ravaged secondary makes little sense.
This is the second time Beckham has gone on the record to take a veiled shot at his quarterback. He spoke during an interview with ESPN's Josina Anderson in October about his frustration with Manning's penchant for shorter throws instead of looking downfield.
After that interview, Giants co-owner John Mara told reporters Beckham "needs to do a little more playing and a little less talking."
Having Beckham throw further shade at Manning isn't what Mara will have wanted to see after another disappointing defeat for New York.