Updated: May 24, 2014 12:59AM
SAN DIEGO — It took all of five batters Friday night for $52 million pitcher Edwin Jackson to give up as many runs in one inning as he had in his last three starts.
That’s how quickly he went from a feel-good May to a here-we-go-again night against a Padres team he has never beaten.
Jackson gave up four runs in the first, three in the second and lasted only four ugly innings in an 11-1 loss to the worst-hitting team in the majors at pitcher-friendly Petco Park.
The Cubs trailed 8-1 before they scored in the seventh after a leadoff double by Luis Valbuena and an RBI single by Welington Castillo.
Jackson’s season ERA jumped nearly a full point – from 3.98 to 4.94 – as he fell to 0-5 lifetime against the Padres (6.94 ERA in 11 games).
Jackson had won two of his last three starts and had a 1.80 ERA in three May starts before the nine-hit, two-walk debacle.
The Cubs’ starting rotation had a 4-0 record and 1.10 ERA in its previous five starts.