What are the statistics on the proportion of straight red cards that are shown in European leagues? That is, red cards that are shown immediately, rather than after two yellow cards.
This HowTheyPlay article lists the number of straight red cards, and red cards after two yellows, for each Premier League season between 2009-10 and 2018-19.
|Season||2 Yellows||Straight Reds||Total|
Straight red cards consistently make up more than half of all red cards. The exact proportion varies from season to season - straight reds made up 73.6% of all red cards in 2013/14, but just 50.7% the following season. On average, during those 10 seasons, straight reds make up 60.71% of all red cards, or just over 3/5ths.
This is only the English Premier League; I don't know whether the proportion is similar in other European leagues.