Blackpool fans staged a protest against Karl Oyston as their team lost 1-0 at home to Burnley in a friendly on Saturday.
Former England Under-21 striker Marvin Sordell, who joined the Clarets last month for an undisclosed fee from Charlton, scored midway through the second half to give the visitors a narrow victory at Bloomfield Road.
Hundreds of Seasiders supporters took to the streets around the stadium to voice their displeasure towards their club chairman Oyston, whose worrying stewardship has left Blackpool with just 13 registered players one week ahead of the Sky Bet Championship kick-off at Nottingham Forest.
There were nine unnamed trialists in the matchday squad against Burnley, including former Swansea and Brighton winger Andrea Orlandi. Bristol City goalkeeper Elliott Parish and experienced midfielder Darren Ambrose were also understood to be among the players looking to impress manager Jose Riga.
Steven Reid made his first start for Burnley at left-back since joining from West Brom.
The match was settled in the 68th minute. A deep Kieran Trippier cross was nodded back by Danny Lafferty to the feet of Dean Marney, and the latter's touch allowed Sordell to score his third goal in four pre-season outings.