Sherman, who entered the race on the final day to submit papers, is a Republican, and his two opponents are Democrats, although the race is officially nonpartisan.
The poll of 404 likely voters, conducted Jan. 2-6 by Competitive Edge Research, initially showed Gloria with 30% and Sherman and Bry tied at 12%.
However, when poll takers explained the candidates’ positions, the results changed to 33% for Gloria, 27% for Sherman and 15% for Bry.
“When voters learn about all the candidates, Scott shoots to a commanding 2nd place,” the Sherman campaign said in a statement.
The poll has a margin of error of 4.9%.
Bry said the poll was designed to promote Sherman’s candidacy and shouldn’t be considered an objective evaluation of the likely election outcome.
“It should come as no surprise to anyone that our polling shows the opposite,” she said. “San Diego voters are interested in fixing city government, not playing political games.”
The top two vote-getters in the March 3 primary election will advance to the November runoff.