Baseball is the hardest sport

Although the sports you mentioned are difficult they all have their break periods. Football for example has huddles in between plays with players hustling on and off the field for breaks. Ice hockey, a typical foward would play between 12-20 minutes per a 60 minute game with breaks in between. MMA is hard but the fact it is a single person match with no teams involved might just make it easier in contrast. whereas a win is dictated by a single person in mma, a win is dictated by many players including the fielders, coaches, pinch hitters, pinch runners, batters, in baseball. This team effort makes a win in baseball much harder to accomplish because a whole team must have solid defense or offense in order to receive a win against a equally matched team. Baseball is not just limited to hitting, but requires tremendous athletic ability both mentally and physically. A typically ball off the bat travels upwards of 120 mph. this gives a third baseman the amount of time to react as a batter reacts to a pitch. from the moment a pitch is thrown a fielder has around .800-900ths of a second to field the ball cleanly in a 160 sq foot area. then he must throw from a stand 120 feet across the diamond to first base to get the runner out. this typically means the third baseman has a margin of error of .15ths of a second. likewise a shortstop must cover up to twice the sq foot distance and sometimes throw even further from first base in order to acheive an out, all while the ball is travelling 120 mph bouncing and taking bad hops or fast bounces through the infield. likewise an outfielder must correctly identify the balls path through the air including spin, wind, the sun, and distance needed to where the ball will land. As in other sports most positions are dictated by a specialist or a player who specifically is built for that position. Players in baseball must all have fielding ability and be required to hit the ball, this means they must be agile and fast enough with a high threshhold for reaction time. An average baseball player must also be able to run to first in close to 4 seconds, this means sprinting from a swinging stance 90 feet to first. Given that a football player runs a 40 yard dash in 5 seconds, which is 120 feet, this gives most outfield and infield baseball players speed akin to football players when it comes to sprinting. Durability is an important factor in baseball also. where football players play one game a week and baseketball players player 80+ games in a season, baseball players must play 162 games plus playoff games in a 5-6 month season, this also does not include spring training games and practices. The daily wear and tear of constant throwing and batting, and the mental exhaustion accompanying the grueling season is another factor that just puts baseball at the top of the list. The physical part is by no means the only part as the mental part is more of a factor in baseball. Like in other sports a player can train and become physically adapted to certain roles and be a good player, no amount of athletic ability can guarantee success in baseball. because of the highest failure rate in all of sports, a baseball players mind must be completely confident with no room for doubt or analysis. This means in between pitches as a batter and a fielder, .15ths of a millisecond of doubt is enough for a missed groundball or a missed pitch. this leads many baseball players to failure through paralysis by analysis. the mental part affects all aspects of baseball and without 100% confidence, great guessing skills, etc, a baseball player will never succeed, whereas a football or basketball player might. This only touches a little bit on the mental prepartions required for a baseball player everytime he steps on the field.