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Parker in action for West Ham United against West Bromwich Albion last season, a game in which he is credited for inspring their comeback from three goals down to draw 3-3.
The captain is the leader of a team. Ideally, he is someone who can both motivate and be the on-field conductor (or interpreter) of a manager's game-plan. This is to say that deciding who wears a captain's armband is a decision not to be taken lightly.
If there is an over-emphasis in English football on its value, that is only because it has often been defined by certain images: World Cup winning skipper Bobby Moore, coolness personified in the face of pressure; David Beckham's one-man salvaging act against Greece in 2002; perhaps most famously, Terry Butcher, bloodied and bandaged during a World Cup qualifier versus Sweden in 1989.
The qualities that personify these examples—calmness, determination and bravery—could be argued were representative in all three of the aforementioned players, at least for a certain time. In the process of maturing into the player he is now, Parker has demonstrated these in abundance.
Since joining Tottenham, he has added a focus that was at times lacking in the side. While Spurs (as does England) have people who can organise and encourage in defence, beyond that there was the impression prior to Parker's arrival that the rest of the side was lacking in these areas. That is an element that has been instilled into his latest club, and they are far less likely now to look like giving up when their backs are against the wall.
This was the case when Tottenham went 2-0 down away at Manchester City last month. Parker hadn't enjoyed the best of first-halves, but even before his side had conceded, the midfielder had been urging his team on and leading by example with a marked improvement in his own game.
That day too, he demonstrated his bravery and commitment to the cause. After luckily escaping serious injury after being stamped on the head by (the reprehensible) Mario Balotelli, Parker did not choose it as an excuse to call it a day. Instead, he got his treatment, got back on and went about doing his job.
Such level of commitment was in evidence too on a day that is destined to go into the folklore of his career. Last February, his then-club West Ham United trailed West Bromwich Albion at half-time 3-0, at which point Parker decided it was not the time to remain quiet.
"Scott showed a lot of passion in the changing room and it spurred us on", said Hammers striker Carlton Cole at the time. "It was inspirational and if you were in there, you would have had a tear in your eye".
West Ham went on to earn a 3-3 draw that afternoon. These qualities may not be unique to Parker among his potential teammates at Euro 2012, but there are other reasons why he stands out as a potential captain.