Umm Yea really anybody that's playing deffense during that inning can catch an infield fly hell even a center feilder could catch an infield fly if he's fast enough
The first baseman is often thrown the baseball at the end of an inning because they are typically closer to the pitcher's mound, making it a shorter throw. This allows for a quicker and more efficient return of the ball to the pitcher to start the next inning.
Source the baseballlibrary site: Billy Martin alertness saved the seventh game of the 1952 world series for the Yankees 4-2. In the seventh inning with the bases loaded and two outs Jackie Robinson hit a pop-up near the pitchers mound. It seemed to freeze the entire Yankee infield until Martin raced in from his 2nd base position to make a lunging catch to end the inning.
A defensive inning (1/2 inning actually) is when the players are in position in the infield and outfield with the defensive pitcher throwing the ball to the catcher trying to not have the batter (offensive Player) hit the ball.
A baseball game is capable of postponement at any given time during the game regardless of the inning or the circumstance however what happens after that depends on the circumstance of the outcome.
The starting pitcher.
Six, three for each side constitues one full inning in baseball.
there is no mercy rule in the MLB. in Junior High baseball it is the 5 inning. It is also the 5 inning for high school
There are 9 regulation inning in baseball.
With respects to the sport of baseball (which I believe is the root of your question), the term "top of the fifth" simply refers to the first half of the fifth inning during which the visiting team has the opportunity to bat. After the visiting team cycles through their allotted three outs, the inning enters the bottom of the inning. Each inning has both a "top" and "bottom" half. The actual term "top" or "bottom" of an inning stems from the placement of the score on either the top or bottom section of a scoreboard or scorecard.
touchdown
It is the last inning of the game and what can be the outcome of a game.