I don't see where your question is specifically addressed, but it appears to say that Davis can't be a candidate, not just that he can't be on the ballot.
http://www.igs.berkeley.edu/library/htRecall2003.htmlCALIFORNIA CONSTITUTION
ARTICLE 2 VOTING, INITIATIVE AND REFERENDUM, AND RECALL
SEC. 15. (a) An election to determine whether to recall an officer
and, if appropriate, to elect a successor shall be called by the
Governor and held not less than 60 days nor more than 80 days from
the date of certification of sufficient signatures.
(b) A recall election may be conducted within 180 days from the
date of certification of sufficient signatures in order that the
election may be consolidated with the next regularly scheduled
election occurring wholly or partially within the same jurisdiction
in which the recall election is held, if the number of voters
eligible to vote at that next regularly scheduled election equal at
least 50 percent of all the voters eligible to vote at the recall
election.
(c) If the majority vote on the question is to recall, the officer
is removed and, if there is a candidate, the candidate who receives
a plurality is the successor.
The officer may not be a candidate,
nor shall there be any candidacy for an office filled pursuant to
subdivision (d) of Section 16 of Article VI.