POLL: Glen Johnson - At fault for Liverpool's defensive frailties this season?

Former footballer Tony Cascarino believes that Glen Johnson's defensive frailties are responsible for Liverpool FC's poor defensive showing so far this season. Is he right or wrong?

Liverpool have conceded 7 goals in 4 league games this season. In his column, Cascarino argued:

"It's no coincidence that the Liverpool defence has conceded more goals since he [Johnson] has joined the club.