We can theorize all we want, but Brock posted a link that has the data. You can sort this by two columns, pitchers used/game and time/game. The two data points match up almost exactly, and not just recently -- throughout baseball history. I would add that the when 100% of games became televised in the 1980s, ~10 minutes were added right to the top. I would argue that TV has slowly added more advertising as the years went on, most likely grabbing more time during pitching changes. We focus on pitch clocks in these conversations, but that's not the issue. Thus, it won't fix the issue. It's worth noting that last year's rules to call some games before 9 innings and force pitchers to face three batters made no difference. It we want a pitch clock, it should be to limit the number of warmup pitches a relief pitcher gets on the mound. I don't know how much time it takes them to throw the dozen or so pitches they are allotted now, but if it's more than 2-3 minutes, let's start there. Nine times out of ten, the pitcher has been tossing for half an inning before they come in the game anyway. Or, we can stop timing the games and not worry about it. Attendance is high. Payroll is high. Income is high. Television contracts are high. Why do we really care? Who is being hurt by baseball games lasting 3 hours instead of 2 hours and 50 minutes?