"It's getting better each day," Anderson said. "I think skipping one time through will just give me the insurance to make sure it's right. It should clear up all the soreness so I can just get back to pitching. Everyone thought it would be the best decision moving forward."
Anderson felt pain for a short time during his last start against the Red Sox, who tagged him for six runs on eight hits in just four innings, but it has escalated slightly since then.
"Any time [your landing foot is] compromised, it's going to affect you," Anderson said.
"It's one of those things where you know it's not normal. If you're going bad, you want to get out there right away to correct it, but I think in the long run, trying to get this out of the way and not have any lasting effects so I can get back to pitching like I know I can is the right thing to do."
The lefty has a 7.23 ERA through his first five outings, but he's not the only starter struggling. Every A's starter not named Bartolo Colon has combined for a 6.61 ERA and 3-10 record.
Straily, back for a second stint with Oakland, has allowed just two earned runs with 20 strikeouts in 18 2/3 innings spanning three starts for Triple-A Sacramento. The A's are expected to option right-hander Jesse Chavez to Sacramento once Straily's promotion is made official Monday.
Jane Lee is a reporter for MLB.com. Read her blog, Major Lee-ague, and follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.