Jason Wood said:
A bigger question is...if 40-times are so irrelevant, why are they such an enormous part of the draft analysis process and media coverage?
this is a good question...ideally, it would be nice to have a player with impressive prep & collegiate resume, a body of work that bears up under intense game film scrutiny, COUPLED with great explosiveness, speed, quickness & strength measurables... in that context, measurables might be useful for parsing the elite prospects... champ bailey looked great in college & had demonstrable off-the-charts athleticism & versatility, but the fact that he ran an elite 40 time arguably helped to foreshadow how well he would transition to the NFL, matched up against similary fast pro WRs...if the two don't go together, it does seem to be a questionable practice to put 40 time ahead of the body of work, which some scouts say should comprise something like 90% of the OVERALL evaluation (the mike mamula theorem)... at least with players that flashed adequate FUNCTIONAL & PLAYING speed, we can say they are football players... with workout warriors, not only do you not know, if anything there is reason to have serious concern... sometimes great athletes can be coached up, but inherent attributes like instincts for the game, toughness, etc, aren't so easily coached up...boldin showed he was a football player (at time, florida prep all time leader in career combined yards as star running QB, great career at florida state), & like rice & TO before him, compensated for lack of pure top end speed with above average short area burst & acceleration... boldin is an interesting & oft-cited example of an ostensibly "slow" skill position player suceeding, but if i'm not mistaken, he significantly bettered his time at pro day, & i think some scouts thought that as he returned to pre-knee injury form, he would regain some of his speed (reportedly in 4.4 range prior to injury)...it isn't completely ridiculous to see why some scouts would want to weight speed measurables into the overall evaluation (though no doubt a lot of us would agree it can be over-weighted & the expense of damning game film, to a team's peril)... while players that looked great in college but with suspect speed & explosive measurables MIGHT be the next boldin, for every story like boldin, there must be far more where... if a prospect times like he is REALLY ponderous, maybe he is... maybe he looked like a sure thing against slower, less talented college players, but the question remains how he will fare against far faster & more talented NFL athletes...some drills are more important by position... you don't want a slow CB, but a "slower" (but still relatively fast) CB can compensate with exceptional quickness... a extremely fast CB with poor feet, movement skills, change of direction ability, is a serious problem, & may be uncorrectable...your question was about 40 time, though, jason, & maybe it can be extended to other measurables...westbrook is a nice contra-indicator in a few ways... he doesn't have optimal size you would like for the position, but he brings so many other things to the table, that on balance, he might be one of the 2-3 top RBs in the NFL currently...he also isn't fast, & some may even call him slow... i think he is a pedestrian (for a RB) 4.6 guy... but his first step initial quickness is among the best in the business... & this does bring up at least one flaw with the 40, & points out how it can be a very crude & blunt instrument for measuring prospects, when wielded clumsily... football isn't run in straight lines, at one speed... westbrook may be slower than a lot of defenders in 40, but he is far quicker... & when he is starting & stopping, changing directions, putting ankle-breaking double moves on them, now the defenders are in his world... & when forced to NOT run the 40 in a straight line, now all of a sudden they are chasing from behind, lunging & missing him...another problem is that 40 time is so obviously unnatural & contrived... some players are track shorts fast, & some are pad fast... if you aren't the latter, what difference does it make if you are the former...

also, some players have better build up speed... it may take a bit longer to get to full speed, but once they are there, they may actually be faster than other players with better initial speed but less top end speed...so it would be interesting to see prospects run in pads... & also see how fast they ran with a running start... the 40 is also unnatural & contrived in that RBs may not employ pure track form when carrying ball through the OL... when they are really playing & using running style in a way that accounts for ball security, are some RBs faster or slower in that context? some RBs bounce off tacklers & maintain their speed better, relative to one another... and so on...40 time doesn't address this stuff...* i wrote this before seeing your excellent post, wildman, making mine somewhat redundant... good work...* another way to look at how speed requirements are different positionally, is for linemen (though you don't want LTs that are TOO slow, but even there quickness, athleticism & strength great compensators)... how well do lineman maintain speed while being karate chopped in the neck, which on almost every play of the game, would be a deathblow for one of us?

ali smith might be a good illustration of some of the concepts at the crux of this conversation...looks good on film... but ran a horrific 40 time at combine... if he didn't better it substantially at pro day (i think maybe he did, but only marginally), this could be a problem for him... his size & skill set may make him better fit at WLB in NFL... but if he is too slow of foot, there are legit questions of whether his college production will translate well to NFL speed, & if he will be able to play in space...