|Born||7 March 1960|
Siegfried "Siggi" Wentz (born 7 March 1960) is a German former track and field athlete who competed in the decathlon. He is the 1984 Olympic bronze medallist, and a two-time World Championship medallist.
Wentz was born in Rothenbach. In the 1980s and until 1990 he represented West Germany and belonged to the world elite in the decathlon. His most notable result was winning the bronze medal at the 1984 Summer Olympics in Los Angeles, California. At that event he scored 8412 points, his results for each of the events were 10.99s - 7.11m - 15.87m - 2.09m - 47.78s - 14.35s - 46.60m - 4.50m - 67.68m - 4:33.96 min.
His personal best result of 8762 points in Filderstadt-Bernhausen on 5 June 1983, placed him third on the world all-time list at that time behind Jürgen Hingsen and Daley Thompson, and still ranks him 14th on the all-time list (as of 2018). It ranks him third among German decathletes, only behind Hingsen and Uwe Freimuth. 
|1982||European Championships||Athens, Greece||20th||7284 pts|
|1983||World Championships||Helsinki, Finland||3rd||8478 pts|
|1984||Olympic Games||Los Angeles, United States||3rd||8412 pts|
|1986||European Championships||Stuttgart, Germany||3rd||8676 pts|
|1987||Universiade||Zagreb, Yugoslavia||1st||8348 pts|
|World Championship||Rome. Italy||2nd||8461 pts|
|1990||European Championships||Split, Yugoslavia]]||12th||7810 pts|
Wentz represented USC Mainz sports club. During his active sport career he was 1.93 meters tall and weighed 93 kilograms.
- Altmaier, Doris; Wentz, Siegfried: Ernährung mit Spaß - Bewegung mit Maß (Nutrition with Fun - Movement with Measure), 2004, Fitness Advisor
| Men's heptathlon world record holder
20 February 1982 – 12 February 1989