After throwing a no-hitter earlier this year and completing a stretch of more than 30 1/3 innings in which he gave up only one run, Lincecum has struggled in each of his past six starts. He has given up 26 earned runs in just 24 1/3 innings and posted a 1-3 record.
While Lincecum has only two career regular-season relief appearances, he had five relief appearances during the Giants 2012 postseason, including two scoreless appearances in the 2012 World Series.
The four-time all-star will make $17 million this season and is due $18 million next year.
- Will Green