2013: Outdoor- Took 19th in the 800-meter run prelims at the NCAA Championships with a time of 1:51.91 for Honorable Mention All-America honors...Qualified automatically for the NCAA Championships after taking second in his heat (sixth overall) in the 800 semifinals at the NCAA Prelims with a 1:51.72...Took third in the 800 finals at the SEC Championships after crossing the finish line in 1:48.05...Part of winning sprint medley relay team at the Drake Relays that clocked a 3:17.72...Was 32nd in the 1500 (3:49.65) at the Mt. SAC Relays...Clocked a career-best time of 1:47.56 for fifth place in the 800 Olympic Dev. Elite race at the Mt. SAC Relays...Earned runner-up honors in the 800 at the Florida Relays with a time of 1:47.95...Ran a leg on the winning distance medley team after they registered a 9:57.66 at the Florida Relays...Part of winning sprint medley team at the Georgia Relays with a time of 3:24.66...Also won the 1500 at the Georgia Relays after finishing his laps in 3:55.75.
2013: Indoor- Cruised to his first victory as a Bulldog in the 800-meter run after completing his laps in 1:50.59 at the Akron Invite...Won the 800 at the VT Elite Meet after clocking a 1:51.42...After coming in with the 10th-best time, he managed a runner-up finish in the 800 finals with a personal-best time of 1:49.13 at the SEC Championships...Completed his indoor season by finishing eighth in the 800 (1:49.19) at the Alex Wilson Invite.
High School: Won Luxembourgish championships in both the indoor and outdoor 800-meter runs...Named the 2010 Luxembourgish Male Athlete of the Year...Has a personal-best outdoor 800 time of 1:49.03 after clocking a career-best 1:50.14 indoors, which broke the Texas State school record...Captured the 2012 Southland Conference (SLC) Outdoor Championships in the 800 with a time of 1:50.49...Finished second in the 800 at the 2012 SLC Indoor Championships to also earn all-conference honors.
Personal: Born June 2, 1992...Son of Romain Grethen and Michele Grethen...Majoring in pre-Business and Finance.