That isn't to say he's not capable of doing damage to a secondary heading into Sunday's game against the Ravens at M&T Bank Stadium.
Although Palmer's spirals lack the zip they had during his days with the Cincinnati Bengals and prior to that as a Heisman Trophy winner at USC, the veteran quarterback hasn't lost his inclination and ability to throw the deep ball.
Palmer has passed for 2,355 yards and 13 touchdowns with six interceptions for an 85.6 quarterback rating, a resurgent season for the 32-year-old after struggling a bit last season during his first year in Oakland when he passed for 2,753 yards, 13 touchdowns and 16 interceptions.
Ravens veteran left offensive guard Bobbie Williams is extremely familiar with Palmer's game having blocked for him for several seasons when both players were in the Bengals' offensive huddle.
"He's always looking for the big home run," Williams said. "That's something that hasn't changed. If it's there, then he'll definitely go after it. That's just one thing that you know about him, a guy that's looking for the big home run."
During a 42-32 loss to the Tampa Bay Buccaneers last week, Palmer launched a season-high 61 passes for 414 yards, four touchdowns and three interceptions.
And Palmer has speedy wide receivers to throw to in former University of Maryland standout Darrius Heyward-Bey (19 receptions, 289 yards and two touchdowns) and Denarius Moore (30 catches, 485 yards and four touchdowns).
If Palmer is provided sufficient time, he's extremely dangerous.
And the Ravens have only generated 13 sacks this season, ranking 25th in the NFL in pass rushing production.
"If you give him time, he can be pretty accurate," Williams said of Palmer. "The thing with him is you have to get in his face and get around him and get him unnerved and then have him kind of go through his progressions. With a defense like ours, it will be hard for him to do. When he's deadliest, he likes to sit back and pick you apart if you give him time."