Not much has changed in the race between senior Casey Pachall and sophomore Trevone Boykin for the starting quarterback job, TCU coach Gary Patterson said after practice Tuesday.“Right now, it’s a neck-and-neck race,” he said.However, a few lengths behind and picking up speed is redshirt freshman Tyler Matthews, who has made drastic improvements since his entrance into the TCU program last spring as an early enrollee.“Tyler’s come a long way. It’s not even close to where he was a spring ago,” Patterson said.Matthews waited for half a season behind Pachall and Boykin and then behind Boykin and Matt Brown for the remainder, gaining much needed experience in practice while maintaining his redshirt status.Patterson’s evaluations of quarterbacks during spring and fall practice always come in more game-speed scrimmage situations, he’s said frequently. Coming off one of the Horned Frogs’ final full-team scrimmages Matthews is the player who received rave reviews from the TCU coach.“We’ve been excited about some of the things he’s done,” he said.The 6-foot-3, 215-pound quarterback from Kansas garnered a four-star ranking from rivals.com coming into TCU, but Matthews enters the 2013 season a new and improved man, Patterson said.“He’s a lot different quarterback than he was last spring,” Patterson said.Questions still remainTCU will pull up the stakes on this spring camp Saturday, leaving Thursday as a short practice and a scrimmage consisting mostly of the second- and third-string players.In that short time, the coaching staff hopes to see a wide receiver step up as the ace of the staff and be the Frogs’ go-to guy in high-pressure situations.“There’s guys making plays, but we’ve dropped a couple today,” Gary Patterson said. “All of them have signs [of being consistently great]. You’ve got to be able to do it every week.”Another weakness through spring practice has been the Frogs’ center-to-quarterback exchange as senior Eric Tausch and sophomore Joey Hunt battle for the starting nod. While both saw playing time on the line last year, neither picked up a start at center.The performance of a few players leaves Patterson the good dilemma of where they will fall in the depth chart after a quality spring performance.On top of Patterson’s A-list is sophomore defensive end James McFarland, who has excelled in his defensive role as well as his job on special teams units, Patterson said.As a whole, Patterson said the journey through spring ball has seen the Frogs change for the better.“We’ve come a long way as a football team in 13 practices,” he said.Healthy springSam Carter sprained his foot during the Frogs’ last scrimmage, but Gary Patterson said it shouldn’t hold Carter out in a spring that has seen the Frogs remain extremely healthy and recover from previous injuries.