Crooks was impressed with the performance of Jagielka for Everton against Burnley at Goodison Park in the Premier League at the weekend.
The 34-year-old centre-back started the match on Saturday afternoon and played for the entire 90 minutes.
The England international performed admirably in defence and also scored opened the scoring four minutes into the second half.
It was the third game in a row in which Jagielka had scored as Everton won 3-1, and former Tottenham forward Crooks was impressed.
“When a centre-back scores goals in three consecutive games you have to consider whether the defender is just going through a purple patch or has a genuine knack of scoring goals,” Crooks wrote on BBC Sport. “I think with Phil Jagielka it's both.
“The Everton defender is certainly going through a wonderful period of scoring goals and that is because he is good at it.
“His goal in the win against Burnley was absolutely superb for two reasons. Firstly because, more often than not, he times his run to perfection and gets his head on the ball and, secondly, because of his desire.
“The way Jagielka responded to the initial save by Burnley keeper Tom Heaton (goalline technology said it had gone in, by the way) was striker-like, while as a defender his ability to read situations at the back has stood him in good stead all his career. A top-class professional.”
Everton are seventh in the Premier League table at the moment with 57 points from 33 matches, seven points behind fourth-placed Manchester City, who have played a fewer game.
Ronald Koeman’s side will return to action this coming weekend when they take on West Ham United at the London Stadium in the Premier League.