.jpg) Costello with the Stanford Cardinal in 2018 | |
| No. 19 | |
|---|---|
| Position | Quarterback |
| Personal information | |
| Born | (1997-06-07)June 7, 1997 (age 28) Newport Beach, California, U.S. |
| Listed height | 6 ft 5 in (1.96 m) |
| Listed weight | 225 lb (102 kg) |
| Career information | |
| High school | Santa Margarita Catholic (Rancho Santa Margarita, California) |
| College |
|
| NFL draft | 2021: undrafted |
| Career history | |
| |
* Offseason and/or practice squad member only | |
| Awards and highlights | |
| |
Kevin Richard "K. J." Costello (born June 7, 1997) is an American former professionalfootballquarterback. He playedcollege football for theStanford Cardinal and theMississippi State Bulldogs.
Costello attendedSanta Margarita Catholic High School inRancho Santa Margarita, California. During hishigh school football career, he passed for a school record 8,222 yards, surpassing a record previously held byCarson Palmer[1] and 62 passing touchdowns.[2] Rated as one of the top quarterback recruits in his class, Costello committed toStanford University to play college football.[3][4]
Costello redshirted his first year at Stanford in 2016. He entered 2017 as a backup toKeller Chryst, but made his first career start againstUCLA after Chryst was injured.[5][6] Costello returned as the backup after the game; however, he took over as the starter prior to the eighth game of the season.[7][8] He remained the starter throughout the rest of the season and finished with 1,573 passing yards, 14 touchdowns and four interceptions and took the Cardinal to the Pac-12 Championship game.
KJ Costello started 35 games in College football. He holds the SEC Single-Game passing record with 623 yards against the defending national champions, LSU Tigers. He passed Andrew Luck & John Elway for all-time on the list for most passing yards in a single season at Stanford with 3540 yards.[9]
On December 18, 2019, Costello entered the transfer portal as a graduate transfer.[10] On February 3, 2020, Costello announced he would be grad transferring toMississippi State.[11]
Costello made his first start for Mississippi State on September 26, 2020, where he broke the SEC record for passing yards in a single game with 623 yards in a 44–34 victory over the defending national champion,LSU.[12]
| Season | Team | Games | Passing | Rushing | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GP | GS | Record | Comp | Att | Pct | Yards | Avg | TD | Int | Rate | Att | Yards | Avg | TD | |||
| 2016 | Stanford |  Redshirt | |||||||||||||||
| 2017 | Stanford | 11 | 7 | 4−3 | 124 | 211 | 58.8 | 1,573 | 7.5 | 14 | 4 | 139.5 | 28 | 92 | 3.3 | 3 | |
| 2018 | Stanford | 13 | 13 | 9−4 | 269 | 413 | 65.1 | 3,540 | 8.6 | 29 | 11 | 155.0 | 42 | -20 | -0.5 | 0 | |
| 2019 | Stanford | 5 | 5 | 2−3 | 102 | 167 | 61.1 | 1,038 | 6.2 | 6 | 3 | 121.6 | 18 | 24 | 1.3 | 0 | |
| 2020 | Mississippi State | 6 | 5 | 1−4 | 134 | 209 | 64.1 | 1,283 | 6.1 | 6 | 11 | 114.6 | 24 | -65 | -2.7 | 0 | |
| Career | 35 | 30 | 16−14 | 629 | 1,000 | 62.9 | 7,434 | 7.4 | 55 | 29 | 137.7 | 112 | 31 | 0.3 | 3 | ||
On August 1, 2021, Costello signed with theLos Angeles Chargers after going undrafted in the2021 NFL draft.[13] He was waived on August 17.[14]
Costello signed with thePhiladelphia Stars of theUnited States Football League on May 27, 2022.[15]
On August 10, 2022, Costello signed with theNew Orleans Saints.[16] He was waived on August 21, 2022.[17]
On February 17, 2023, Costello re-signed with the Philadelphia Stars.[18] He was transferred to the team's inactive list on March 19, 2023.[19] The Stars folded when the XFL and USFL merged to create theUnited Football League (UFL).[20]
| Year | Team | League | Games | Passing | Rushing | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GP | GS | Record | Cmp | Att | Pct | Yds | Y/A | TD | Int | Rtg | Att | Yds | Avg | TD | |||
| 2022 | PHI | USFL | 2 | 0 | 0-0 | 4 | 10 | 40.0 | 69 | 6.9 | 0 | 0 | 64.2 | 5 | -15 | -3.0 | 0 |