Answer by taking a quote from the following article:

Stephen Roche (; born 28 November 1959) is an Irish former professional road racing cyclist. In a 13-year professional career, he peaked in 1987, becoming the second of only two cyclists to win the Triple Crown of victories in the Tour de France and the Giro d'Italia stage races, plus the World road race championship, the first was Eddy Merckx. Roche's rise coincided with that of fellow Irishman Sean Kelly. Although one of the finest cyclists of his generation and admired for his pedalling style, he struggled with knee injuries and never contended in the Grand Tours post-1987.

At the close of 1987, Roche moved to Fagor MBK, bringing English riders Sean Yates and Malcolm Elliot, 1984 Tour de France King of the Mountains winner Robert Millar and domestique Eddy Schepers. The team was criticised for containing too many English speakers.  The 1988 season began badly with a recurrence of the knee injury and Roche began a gradual decline. In 1989 he again took second in Paris-Nice (making four second places) and the Setmana Catalana de Ciclisme. Roche finished the 1989 Giro d'Italia ninth behind Laurent Fignon. During the 1989 Tour de France, Roche withdrew due to his knee.  There were problems with his team in and he changed again. In 1990, racing for Histor Sigma, he won the Four Days of Dunkirk and 1991 riding for Roger De Vlaeminck's TonTon Tapis brought victories in the Setmana Catalana de Ciclisme and Criterium International. In the 1991 Tour de France, Roche missed the start for his team's Team time trial and was forced to withdraw due to controversially missing the time cut.  In the Grand Tours, he was ninth in the 1989 Giro, and won a stage of the 1992 Tour de France in appalling conditions into La Bourboule (again racing for Carrera Jeans-Vagabond but now in support of Claudio Chiappucci) and en route to a final ninth place. Riding the last edition of the Nissan Classic Tour of Ireland, Roche was in many breaks but finished fifth. A year later, he was again ninth in the 1993 Giro d'Italia and 13th in the 1993 Tour de France.  Roche retired at the end of an anonymous 1993 which yielded a single win, in the post-Tour de France criterium at Chateau Chinon.

Was he retired
The 1988 season began badly