Most fantasy baseball commentary of the “who’s hot” variety is useless. There is no extrapolation of next week’s performance from last week’s streak.
Consider Conor Jackson’s recent weekly lines:
Week 2: 6 runs, 0 home runs, 5 RBI, 0 steals, .381 OBP
Week 3: 10 runs, 3 home runs, 10 RBI, 1 steal, .519 OBP
Week 4: 3 runs, 0 home runs, 3 RBI, 0 steals, .323 OBP
Or compare Scott Olsen and Jon Lester. Entering this week, Olsen had much superior statistics:
Lester: 1 win, 2 losses, 5.42 ERA, 16 Ks in 32.2 IP
Olsen: 3 win, 0 losses, 2.06 ERA, 13 Ks in 35.0 IP
If you dropped Lester to start Olsen this week, you may still have a hangover. That’s the point of this post. Chasing stats will entice you to destruction. It leads to reactive, high-risk, short-term thinking. Don’t do it.
Of course, that statement begs the question: if you don’t chase stats, how do you improve your team? Some players will get hot and stay hot. How long do you wait to be convinced?
The short answer is: You don’t know. No one knows.
The long answer is: Expand your analysis. A week of data is meaningless. Look at the player’s season and career numbers and consider:
- Was he once a lauded prospect?
- Is he recovering from an old injury?
- Do scouting reports or splits indicate that he has fixed a weakness?
- Is he on a new team or been surrounded by new teammates?
- Has he performed like this before for multiple seasons?
I can’t emphasize that last point enough. Even an entire season is a small sample set when you’re trying to predict future performance. Oliver Perez had a 2.99 ERA in 2004, his only season between 2003 and 2006 with an ERA under 5. Melvin Mora had two plus .900 OPS years in 2003 and 2004, a level to which he has never returned.
This is why you needed to shut out ESPN analyst Matthew Berry’s hype for Corey Hart over Grady Sizemore back in March. Here’s an example of Berry’s logic:
…look at their numbers from last season:
Sizemore: 628 at-bats, 118 runs, 24 home runs, 78 RBIs, 33 steals, .277 average
Hart: 505 at-bats, 86 runs, 24 home runs, 81 RBIs, 23 steals, .295 average.
Hart had 123 fewer at-bats and still beat or tied Sizemore in three of five categories.
Now, let’s check in on them this year, through Sunday.
Sizemore: 48 at-bats, 5 runs, 1 home run, 8 RBIs, 3 steals, .313 average.
Hart: 44 at-bats, 8 runs, 0 home runs, 5 RBIs, 3 steals, .295 average.
Sizemore is off to a slightly better start, but my statement is not nearly as crazy as you think, now is it?
Both players now have more than 100 at-bats and Grady Sizemore is still off to a better start:
Sizemore: 29 for 105, 16 runs, 3 home runs, 14 RBIs, 7 steals, .394 OBP.
Hart: 31 for 103, 13 runs, 1 home run, 12 RBIs, 4 steals, .360 OBP.
This is not to say that Hart can’t have a better season than Sizemore. Who knows? But Sizemore has repeated this performance at the major league level three years in a row. Who would you want to put your money on?
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