Seems like the Pakistan Cricket Board (PCB) is convinced of Mohammad Amir's potential to get back to his best after his haul of five wickets in two ODIs against New Zealand. The pacer, who is just 23-years-old, is making a comeback from a five-year ban for spot-fixing during a series in England in 2010. But it hasn't been easy for Amir. The left-armer hardly enjoys the trust of fellow cricketers despite serving his sentence and admitting to his mistakes. He will probably never get rid of the 'spot-fixer' tag for the rest of his career. However, sport is full of cases where athletes have come back from bans and made it big. Whether they should have been allowed to do so or not is a separate argument, but the best redemption for them is performance. Here are five 'former cheats' who made an impact on their sport after lengthy bans:

David Millar

Cyclist Millar's doping scandal broke before the big daddy of all doping scandals i.e. Lance Armstrong's came into the spotlight. The Scotsman was banned for two years in 2004 but since then has made a strong comeback and campaigner against doping.

Since returning to action in 2006, he has won one stage each in individual and team time trial at the Tour de France, he's got the same record in the Giro d'Italia and won another individual stage at Vuelta a Espana. In 2007, he held both the individual and team British National Road Championship. But the crowning glory of his comeback was the gold medal at the Commonwealth Games in 2008 and captaining the British Road Race Team at London 2012 Olympics.