At the beginning of James's NBA career, he was considered a poor defensive player,[318] but he improved steadily through the years. In 2009, he became proficient at the chase-down block, which involves coming in from behind the opposition in transition to block the shot.[62] In Miami, he developed into a more versatile defensive player, and the Heat relied on him to guard all five positions.[319] Along with Shane Battier and Dwyane Wade, Miami used James in an ultra-aggressive defensive scheme,[320] with James cheating off the ball to help out inside or get into rebounding position.[321] Beginning in 2014, some analysts reported a regression in his defensive impact, stemming from a lack of effort and expected age-related declines.[322][323] During his second stint in Cleveland, his defense progressively declined. After missed drives on offense, he often dawdled back on defense while complaining to the referees; he provided less help off the ball, and was less aggressive in switching.[324] James himself admitted to taking plays off at times, referring to this approach as "chill mode".[325] He eventually developed a reputation for raising his defensive level in the playoffs, which some analysts referred to as "Playoff LeBron".[326]