Who's better: Roy Halladay or Cliff Lee?

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Clearly the Phillies’ decision to part with Cliff Lee and bring in Roy Halladay goes beyond each pitcher’s value for 2010.
Halladay is apparently willing to sign a long-term deal to remain in Philadelphia while Lee is reportedly intent on testing the free agent market next offseason, which makes it more complicated than simply asking “who’s better?”
With that said … well, I’m still interested in asking “who’s better?” Here’s what Halladay and Lee did in 2009:

2009              GS      IP      ERA     xFIP     SO9     BB9     OAVG
Roy Halladay      32     239     2.79     3.05     7.8     1.3     .256
Cliff Lee         34     232     3.22     3.69     7.0     1.7     .272

Those are regular season numbers, so they don’t include Lee going 4-0 with a 1.56 ERA in the playoffs. And during the regular season Halladay had more strikeouts with fewer walks while being tougher to hit, so not surprisingly his ERA was 14 percent lower than Lee’s. He also topped Lee by 17 percent in Expected Fielding Independent Pitching (xFIP), which is basically like ERA with luck, ballparks, defenses, and bullpens removed from the equation. Lee was great in 2009, but Halladay was even better.
Here are the same numbers from 2008:

2008              GS      IP      ERA     xFIP     SO9     BB9     OAVG
Roy Halladay      33     246     2.78     3.14     7.5     1.4     .237
Cliff Lee         31     223     2.54     3.57     6.9     1.4     .253

Lee won the AL Cy Young in 2008 thanks to his sparkling 22-3 record and league-leading 2.54 ERA, but the secondary numbers show that Halladay was every bit as good and perhaps even better in some respects. Lee bested Halladay by 8 percent in ERA, but Halladay had more strikeouts with the same number of walks and was harder to hit, so he topped Lee by 12 percent in xFIP.
Ultimately both guys are among the truly elite pitchers in all of baseball, so comparing them and choosing a winner is going to ruffle some feathers either way. However, it seems clear to me that for however amazing Lee has been over the past two seasons Halladay has been even better and Halladay also has a far superior pre-2008 track record.
Some people have wondered why the Phillies would bother to orchestrate such a huge trade after what Lee did in the playoffs, but upgrading from an A-plus starter to an A-plus-plus starter while keeping him around long term is plenty of motivation.

Alex Dickerson to undergo Tommy John surgery

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Alex Dickerson, recently diagnosed with a sprained UCL in his left elbow, will undergo Tommy John surgery near the end of March, Dennis Lin of The Athletic reports. Dickerson tried to rehab the injury, but he didn’t show improvement. The surgery will likely end his 2018 season.

Dickerson, 27, missed the entire 2017 season due to a bulging disk in his back, undergoing surgery for that as well. Dickerson performed well in 84 games in 2016, batting .257/.333/.455 with 10 home runs and 37 RBI across 285 plate appearances.

Dickerson was hoping to earn a spot in the Padres’ crowded outfield, but will now concede that opportunity and hope to turn things around next year.