mercurial
MyBB Legend
It's just not really possible to implement a sub system.
Apart from the obvious replacing a specialist bowler with a specialist batsman to strategically gain the upper hand, there are other issues as well. The selection process is a very important part of a game - matches have been won and lost on selection before.
And what about when more than one player is injured and forced to retire hurt (or even dead)? It's not far fetched.... in 1975/76 five Indian players were retired hurt when playing the West Indies in the fourth Test in Jamaica: http://content-rsa.cricinfo.com/ci/engine/match/63162.html
What do you do then?
As I stated earlier, if a batsman gets injured, then they can sub him with a replacement batsman. If a bowler gets injured, then they get a replacement bowler etc... It's not that hard really IMO.