Ortiz, 37, made 16 appearances (eight starts) with the Dodgers last season, and was 1-2 with a 6.30 ERA in 16 games. He also pitched for Triple-A Buffalo in the Mets' system and Triple-A Durham in the Rays' system last year.
He has pitched for the Angels (2000-04), Reds ('05), Nationals ('06), Twins ('07), Rockies ('07), and the Dodgers ('10). In 274 career games (212 starts) over 10 seasons in the Majors, he is 85-82 with a 4.93 ERA. He also spent the 2008 season pitching for the Orix Buffaloes in Japan.
The Cubs' pitching took a double hit when starters Andrew Cashner and Randy Wells were both placed on the disabled list this week. Cashner has a strained right rotator cuff and Wells has a strained right forearm.