CONCORD, Calif.—De La Salle High School coach Bob Ladouceur is retiring after 34 years, ending a run that included a national record 151-game winning streak from 1992 to 2003 and 20 unbeaten seasons.

Ladouceur said at a news conference at the school in San Francisco's East Bay on Friday that it was just "a good time" to step down. Assistant Justin Alumbaugh will take over as the Spartans' head coach.

Ladouceur leaves with a 399-25-3 record, five CIF bowl championships and 28 North Coast titles. De La Salle also finished No. 1 in various national rankings at least seven times.

The school won its fourth straight CIF State Open Division Championship with a 48-28 victory against Corona Centennial on Dec. 15. The program hasn't lost to a Northern California team since 1991.

The 58-year-old Ladouceur took over at De La Salle in 1979 with no head coaching experience. He coached several players who went on to the NFL careers, including Maurice Jones-Drew, Amani Toomer, Derek Landri and D.J. Williams.

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