|Full name||Jasper van der Westhuizen Wiese|
|Date of birth|
|Place of birth||Upington, South Africa|
|Height||1.90 m (6 ft 3 in)|
|Weight||110 kg (17 st 5 lb; 243 lb)|
|University||Central University of Technology|
|Notable relative(s)||Cobus Wiese (brother)|
|Rugby union career|
Jasper van der Westhuizen Wiese (born 21 October 1995) is a South African rugby union player for the Cheetahs in the Pro14, the Free State Cheetahs in the Currie Cup and the Free State XV in the Rugby Challenge. He can play as an eighth man or a flanker.
In 2011, he was included in their Under-16 Grant Khomo Week squad for the tournament held in Queenstown. He started all three of their matches, scoring two tries in their second match against Border Country Districts in a 36-15 win and one in their final match against Namibia. His three tries during the tournament placed him in joint-third in the try-scoring charts for the competition, just one behind the leading try scorers.
The following year, he was included in the Griquas Country Districts squad that competed in South Africa's premier rugby union tournament at high school level, the Under-18 Craven Week, held in Port Elizabeth. He emulated his appearance and try-scoring record at the previous year's Grant Khomo Week, scoring three tries in three starts. This time, he scored a hat-trick of tries in a 38-5 victory over Border Country Districts in their second match at the tournament, again a single try behind the leading try-scorers in the competition.
He once again represented his team at the Under-18 Craven Week in 2013, held in Polokwane, starting all three matches and scoring two tries; he scored for the third successive year against Border Country Districts in their opening match and a second against the Leopards in their final match.
After high school, Wiese moved to Bloemfontein, where he joined the academy of the Free State Cheetahs and the CUT Ixias university team. He made four appearances for CUT in group stages of the 2014 Varsity Shield competition - one of which was in the run-on side - in a season that saw his team win the competition by beating UKZN Impi in the final and subsequently winning promotion to the Varsity Cup for 2015. In the second half of the season, Wiese played for the Free State U19 team in the Under-19 Provincial Championship. He started all of their matches in the number eight jersey, helping them to second spot on the log by scoring nine tries in the competition, second only to Blue Bulls U19' Jurie Linde in Group A of the competition. He didn't score in the first seven rounds of the competition, but got off the mark in a 34-0 victory over Golden Lions U19s in Round Eight. He scored four tries in their 54-15 victory over Leopards U19 in their next match, and a try in each of the last three matches of the regular season, against Blue Bulls U19,Western Province U19 and Golden Lions U19. His final try came in their semi-final match against Western Province U19, but it wasn't enough to help his side into the final, with the team from Cape Town winning 29-22.
He was invited to trials for the South Africa Under-20 squad as they prepared for the 2015 World Rugby Under 20 Championship, but wasn't included in the training squad named a week later. He also didn't feature for CUT Ixias in the 2015 Varsity Cup or for the Free State XV in the 2015 Vodacom Cup, despite being included in both squads, but returned to action in the second half of the season by playing for Free State U21 in the Under-21 Provincial Championship. With Steven Meiring being the first choice eighth man for the team, Wiese shifted to the flank, where he made nine starts and three appearances of the bench. He once again scored several tries for his team - he got tries in matches against Eastern Province U21,Sharks U21,Blue Bulls U21 and Leopards U21, before scoring a hat-trick in their return match against the Sharks U21 in a 74-22 win. Wiese ended the competition as his team's third-highest try scorer behind fellow loose forwards Daniel Maartens and Steven Meiring, as the team finished in second place on the log. Wiese helped them to a 27-22 victory over the Sharks in the semi-final, but the team fell short, losing 17-52 to Western Province U21 in the final.
Wiese got his first taste of Varsity Cup action at the start of 2016, making seven appearances for CUT Ixias in the competition. He scored tries in matches against UP Tuks and NMMU Madibaz as his side finished in sixth spot on the log despite a two-point deduction for fielding an ineligible player. After the Varsity Cup, Wiese joined the Free State XV team for their Currie Cup qualification season. He made his first class debut on 16 April 2016, starting their 17-20 defeat to the Blue Bulls in Round Two of the competition. After another start against Western Province the following week, Wiese scored the first senior try of his career in a 29-15 victory over the Golden Lions XV in Randburg in his side's next match. He eventually made eight starts and one appearance off the bench during the competition as his team finished in sixth spot in the competition. He again reverted to U21 level for the end of the season, where he captained the team in their first four matches, scoring tries in matches against Leopards U21,Blue Bulls U21 and Western Province U21 to help his team to fourth spot on the log. He scored another try in their semi-final against Western Province, but his team's interest in the competition was ended with a 23-26 defeat.
At the end of 2016, Wiese was included in the Cheetahs Super Rugby team's training group for the 2017 Super Rugby season, but it was also announced that he would link up with the Welkom-based Griffons after his Varsity Cup commitments.
He is the older brother of Cobus Wiese, also a first class South African rugby union player.