Born in Weiler im Allgäu, Swabia, Riedle started his senior career in the Bayernliga with FC Augsburg, being club top scorer in the 1985–86 season with a total of 20 goals. His performances attracted interest from newly promoted Bundesliga side SpVgg Blau-Weiß 1890 Berlin, who signed him for a fee of 33,000 Deutsche Mark; he made his league debut for his new team on 9 August 1986, scoring in a 1–4 home loss against 1. FC Kaiserslautern. After his team's relegation, as last, Riedle nonetheless signed with SV Werder Bremen, led by legendary Otto Rehhagel, and netted 18 times in his first season to help the club win the nationaltitle. During his three-year spell with the Hanseatic he scored 58 goals all competitions comprised, and appeared in back-to-back German Cup finals, losing both and finding the net in the 1989 edition – opening the score in a 1–4 defeat to Borussia Dortmund.
Lazio / Return home
In the 1990 summer, Riedle moved to S.S. Lazio of Italy for a transfer fee of 13 million DM. During his stint with the Roman the club failed to win any silverware or reach any final, and his best output occurred in the 1991–92 campaign when he scored 13 goals in 29 games for an eventual 10th-place finish in Serie A; for two of his three years, he shared teams with countryman Thomas Doll. Riedle returned to Germany in 1993 and joined Borussia Dortmund. He was a starter for most of his spell, often partnering Stéphane Chapuisat, but failed to reproduce his previous form, never scoring in double digits; he was however important in the conquest of the 1995 and 1996 national championships and, in the 1996–97 UEFA Champions League, netted twice against Juventus F.C. in the final for a 3–1 success.
England
In 1997, Riedle joined Liverpool in the Premier League. He was irregularly used during his stint at Anfield, especially after the phasing-in of 18-year-old Michael Owen. In late September 1999, 34-year-old Riedle moved to Fulham where, along with his old Liverpool manager Roy Evans, he would serve as caretaker manager until the end of 1999–2000 after Paul Bracewell's dismissal. Before the end of the following season – where he eventually netted once from 14 appearances to help Fulham to top flight promotion – he announced his retirement.
International career
Riedle made his debut for West Germany on 31 August1988, playing 15 minutes against Finland and scoring in a 4–0 away win for the 1990 FIFA World Cupqualifiers. Selected by coach Franz Beckenbauer for the finals in Italy as a backup to Klinsmann and Rudi Völler, he contributed with four games as the national team won its third title, starting once due to suspension to the latter. One of Riedle's most memorable matches for Germany came during the UEFA Euro 1992 semi-final against Sweden, in which he netted two goals in a 3–2 triumph, eventually being the tournament's joint-top scorer. He gained a total of 42 caps, scoring on 16 occasions.
