In August 2014, after India had capitulated to a 3-1 defeat in a Test series in England, Shastri, who had no prior senior coaching experience, was brought in as team director to work with head coach Duncan Fletcher. India went on to lose a Test and ODI series in Australia, but reached the semi-final of the 2015 World Cup. After that, Fletcher's contract was not renewed and Shastri continued as director, overseeing Test series wins in Sri Lanka, at home against South Africa and a win in the Asia Cup. He is understood to have developed a rapport with captain Virat Kohli during that period, which is one of the chief reasons he is considered the favourite to be named coach this time.
Simmons has coached three international teams - Zimbabwe, Ireland and West Indies. His 18-month stint with West Indies ended in September 2016 after he had disagreements with members of the West Indies Cricket Board and with director of cricket Richard Pybus, who is also a candidate for the India coaching job. His sacking came just four months after West Indies won the World T20. That was a rare high during Simmons' tenure with West Indies - the only other series win, in any format, under him was in a Twenty20 series against India, and the team slipped down the ODI rankings, leading them to miss the 2017 Champions Trophy.
When he was appointed mentor of Kings XI Punjab in the IPL last year - his first coaching stint at any level - Sehwag brought to the job the free-spirited approach that had characterised his batting. Despite Kings XI finishing last in 2016, the management persevered with Sehwag and elevated him to head of cricket operations and strategy for the 2017 season.
Moody will hope to be third-time lucky in the race for the India coaching job, after losing to Greg Chappell in 2005 and Anil Kumble last year.
After injuries restricted his playing career to a solitary List A game, Richard Pybus turned to coaching at a young age and achieved remarkable success. Apart from winning trophies with Titans and Cape Cobras in South Africa, Pybus, born and raised in England, coached Pakistan in the 1999 World Cup, when they made the final. His second stint with Pakistan in the 2000s wasn't as successful though.
A former Mumbai batsman with a first-class average of nearly 50, Lalchand Rajput's post-retirement career has been just as, if not more, fruitful. Rajput was manager of the India team that won the inaugural World T20 in 2007, and he has had successful coaching stints with the India under-19 and A teams.
Arun Venugopal is a correspondent at ESPNcricinfo. @scarletrun