Honors & Awards
- Academic All-Big Ten (2017, 2018)
- Nebraska Scholar-Athlete Honor Roll (Spring 2017)
- Tom Osborne Citizenship Team (2017)
Senior (2018-19)
Guthmiller began his senior campaign by shooting a 234 (+18) at the Duke/Rod Myers Invitational. His best round of the weekend came on Sunday, Sept. 9 when he shot a 74 (+2) to tie for the team-best mark in the third round. He responded nicely to this performance by firing a 213 (E) to lead all NU golfers in the 54-hole Cardinal Regional Challenge in Simpsonville, Ky. the following weekend. His 69 (-2) in the first round of the tournament marked a season-best for him. His 54-hole score of 213 was a career-low mark for him, beating his three-round score of 215, which he hit twice as a junior. He shot a 231 (+15) at the William H. Tucker Invitational on Sept. 29. His best performance of the weekend came in the first round, as he carded a 72 (E). Guthmiller finished out the fall by firing consecutive 54-hole scores of 222 at the Fighting Irish Classic and the Quail Valley Intercollegiate. He placed 73rd at the Fighting Irish Classic and tied for 51st at Quail Valley.
Guthmiller began the spring season of his senior year by going 3-1 at the Big Ten Match Play Championships. He followed that up by shooting a 228 (+12) at the Lamkin San Diego Challenge on March 11-12, finishing in a tie for 64th overall. At The Goodwin, hosted by Stanford University (March 28-30), Guthmiller finished in a tie for 95th after shooting a 226 (+16) at the 54-hole challenge. At the Husker Invitational (April 13), Guthmiller had the best finish of his season when he tied for 10th after shooting a 148 (+6) across 36-holes. He finished second among all Huskers.
The Yankton, S.D., native tied for 48th at the Hawkeye Invitational with a 54-hole score of 219 (+6). He finished out his Huskers career by tying for 48th at the Big Ten Championships as well. Guthmiller went 75-82-72 for a three-day score of 229 (+19). He finished out his NU career with a 74.78 stroke average, which ranks ninth all-time in school history.
Junior (2017-18)
Jace Guthmiller earned a lineup spot in all 10 of Nebraska's stroke play tournaments while also playing a trio of matches at the Big Ten Match Play Championships. He finished the year with a career-best 73.48 stroke average and was the top finisher for the Huskers on six occasions throughout the season, collecting three top-25 finishes. His best match of the year came at the Maui Jim Intercollegiate when he shot an even-par 216 over 54 holes to tie for 12th overall. Guthmiller's best round came at the Jackrabbit when he shot a 65 in the second round. He shot one-under par (215) over three rounds at the Wyoming Desert Intercollegiate to tie for 25th. Guthmiller ended the season with a 225 at the Big Ten Championships to tie for 40th overall.
Sophomore (2016-17)
Guthmiller competed in each of Nebraska's 10 stroke play tournaments and finished with a 73.66 stroke average on the season. He captured a pair of top-20 finishes, including a tie for 19th at the season-opening Badger Invitational with a three-round score of 218. Guthmiller opened the spring campaign by tying for 17th at the Wyoming Desert Intercollegiate with an even-par 216 over 54 holes. He notched an opening-round 69 at the Border Olympics for one of his seven rounds better than par during the season. He was Nebraska's top finisher at the Wyoming Desert Intercollegiate, the Hawkeye Invitational and tied for NU's top finish with Jackson Wendling at the Jackrabbit. Off the course, Guthmiller earned academic All-Big Ten honors and claimed a spot on the Tom Osborne Citizenship Team.
Freshman (2015-16)
Guthmiller played in 10 of 12 tournaments while posting a 77.38 stroke average. Guthmiller managed a pair of top-20 finishes in the fall season. He tied for 13th at the season-opening Ballyneal Challenge (149) before finishing 19th at the Bruce Fossum Memorial (230). In the spring, Guthmiller started every tournament and went 2-1-1 at the Big Ten Match Play. At the Hawkeye Invitational, he fired his best 18-hole score of the season with a 70 in the first round.
Before Nebraska
In the summer of 2015, Guthmiller earned a runner-up finish at the SDGA Junior Championship with a 73. Guthmiller captured the 2014 Yankton Boys Invitational title on the third playoff hole at Hillcrest Golf Course. During the summer, Guthmiller posted a pair of 75s to finish seventh in U.S. Open Local Qualifying.
In October 2014, Guthmiller finished ninth at the SDHSAA Class AA Boys Golf Championships after carding rounds of 79 and 74 at Cattail Crossing Golf Course in Watertown, S.D. Guthmiller finished his career at Yankton High School as a six-time all-conference and three-time all-state selection. He was also a member of the National Honor Society.
Personal
Jace is the son of Dan and Kami Guthmiller and has a younger sister, Elle. Jace was born on Dec. 27, 1996. He is a finance major at Nebraska and earned academic All-Big Ten honors in 2017 and 2018. He claimed a spot on the Tom Osborne Citizenship Team in 2017.
Year-by-Year
| Year | Rounds | Strokes | Average |
| 2015-16 | 26 | 2,012 | 77.38 |
| 2016-17 | 29 | 2,136 |
73.66 |
| 2017-18 | 29 | 2,131 | 73.48 |
| 2018-19 | 29 | 2,172 | 74.89 |
| Career Totals | 113 | 8,451 | 74.78 |
Career Bests
Low Round - 65 (The Jackrabbit, 10/2/17)
Low 54-Hole Score - 213 (Cardinal Regional Challenge, 9/16/18)
Best Tournament Finish - T-9th (Robert Kepler, 4/23/17)
Rounds Under Par - 18