JACKSONVILLE – Four down, four remaining.

Less than two weeks removed from the 2015 NFL Draft, the Jaguars are halfway to having their entire '15 draft class under contract.

Tight end Ben Koyack, a seventh-round selection from the University of Notre Dame, became the fourth member of the eight-member draft class to sign with the Jaguars, signing his rookie contract shortly after noon Thursday at EverBank Field.

"Obviously, I'm excited on the inside," Koyack said. "I'm an even-keel guy, so I might not show it as much, but it's something that's very exciting, something that as a kid you always want to do and you never actually think you'll get a chance to sign an NFL contract.

"The chance to actually get to do it is obviously a dream come true."

Koyack (6-feet-5,255 pounds), the No. 229 overall selection, joined first-round defensive end Dante Fowler Jr., fourth-round safety James Sample and seventh-round wide receiver Neal Sterling as draft selections who signed with the Jaguars this week. Fowler signed Tuesday, with Sample and Sterling signing Wednesday.

"It's just making it official," Koyack said. "It seems like things are happening so fast it doesn't sink in, but upon signing you know it's actually here and it's time to get to work.

"It's something you always work toward. You always want to be your best and you always want to challenge yourself and go as far as you can go. The ceiling just keeps getting higher as long as you work your hardest, and that's something I keep working on."

Koyack played four seasons for Notre Dame, catching 44 passes for 532 yards and five touchdowns. He caught 30 passes for 317 yards and two touchdowns as a senior.

Koyack's signing leaves four Jaguars 2015 draft selections unsigned: running back T.J. Yeldon (second round), offensive guard A.J. Cann (third round), wide receiver Rashad Greene (fifth round) and defensive tackle Michael Bennett (sixth round).

"Now, I just have to go and show I was worth the draft pick," Koyack said. "If you make it to this level, you want to prove to everyone you belong here."