|Date of birth||September 9, 1940|
|Place of birth||Hanover, Germany|
|Date of death||June 18, 1999(aged 58)|
|Place of death||Vienna, Austria|
|Height||1.78 m (5 ft 10 in)|
|1961||West Germany U-23||1||(0)|
|1962||West Germany Amateur||1||(?)|
|1965||West Germany B||1||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 5 May 2012|
Early in his career Ulsaß was a prolific goalscorer at Arminia Hannover in the second tier Amateuroberliga Niedersachsen and later the first tier Oberliga Nord. Eventually Bundesliga side Eintracht Braunschweig took note of Ulsaß, who had already represented the West German under-23 and amateur national teams and was considered a major talent by the German press. He was signed by Braunschweig in 1964 and went on to spend 9 seasons in the Bundesliga with the club. Serving as Eintracht's playmaker, Ulsaß was one of the key players in the team's 1966–67 championship-winning season.
Ulsaß was among the players involved in the 1971 Bundesliga scandal. A number of Eintracht Braunschweig players had accepted bonus payments from a third party for a win in their league game against Rot-Weiß Oberhausen, which was illegal (the game eventually ended 1–1). Ulsaß received a two-year ban and a fine, but was later allowed to transfer out of Germany. He joined Wiener Sport-Club in Austria, where he played for four more years until he retired in 1976.
Ulsaß represented Germany 10 times, including a 1966 FIFA World Cup qualifier against Cyprus, UEFA Euro 1968 qualifier against Albania, 1970 FIFA World Cup qualifier against Austria and 7 friendlies (he scored a hat-trick in 1965 against Austria).
Scores and results table. Germany's goal tally first:
|1.||9 October 1965||Neckarstadion, Stuttgart, West Germany||Austria||Friendly|
|2.||9 October 1965||Neckarstadion, Stuttgart, West Germany||Austria||Friendly|
|3.||9 October 1965||Neckarstadion, Stuttgart, West Germany||Austria||Friendly|
|4.||19 November 1966||Müngersdorfer Stadion, Cologne, West Germany||Norway||Friendly|
|5.||19 November 1966||Müngersdorfer Stadion, Cologne, West Germany||Norway||Friendly|
|6.||22 February 1967||Wildparkstadion, Karlsruhe, West Germany||Morocco||Friendly|
|7.||22 February 1967||Wildparkstadion, Karlsruhe, West Germany||Morocco||Friendly|
|8.||18 December 1968||Estadio Centenario, Montevideo, Uruguay||Chile||Friendly|
- Bundesliga champion: 1967.
- "50 Jahre, 50 Gesichter: Ulsaß führt Braunschweiger zum Titel" (in German). DFB. Retrieved 14 April 2013.
- "Lothar Ulsaß" (in German). kicker.de. Retrieved 12 May 2012.
- Bittner, Jürgen (1997). Deutschlands Fußball-Nationalspieler. Das Lexikon (in German). Sportverlag. p. 506. ISBN 3-328-00749-0.
- "Brunswick - remember the name". espnfc.com. Retrieved 10 April 2013.
- "11 Spiele manipuliert, 52 Profis bestraft" (in German). Die Welt. Retrieved 14 April 2013.
- Arnhold, Matthias (28 June 2017). "Lothar Ulsaß - Matches and Goals in Bundesliga". RSSSF. Retrieved 5 July 2017.
- Arnhold, Matthias (28 June 2017). "Lothar Ulsaß - Goals in International Matches". RSSSF. Retrieved 5 July 2017.
- "Lothar Ulsaß" (in German). fussballdaten.de. Retrieved 12 May 2012.