There is no evidence that Beckett has turned it around. He has lost a couple of mph off his fastball, and according to fangraphs, his pitches have also lost a good deal of movement. Furthermore, he has been pitching poorly for a year now.
Here is the evidence of decreased movement of his pitches. Compare 2007 to 2010; see how many more of his pitches in 2010 didn't move at all vertically or horizontally compared with 07. You can also see that he has lost a couple of MPH off his fastball here: http://www.fangraphs.com/pitchfxg.aspx?playerid=510&position=P&season=2010&date=0&dh=0
Here is an article (from about a month ago or so) that implies that his chances of turning it around are not good:
The historical significance of Beckett’s 2010 John Tomase
In today’s Herald we examined the production of pitchers in their 30s after they had seasons as poor as Josh Beckett’s 2010 (6-6, 5.78). The expectation had been that history would be littered with good pitchers who had similarly down years but bounced back to regain their prior form.
Except it didn’t happen that way at all. Here’s a link to the baseball-reference chart showing the 69 seasons where a pitcher in his 30s compiled an ERA of 5.75 or higher in at least 125 innings pitched. In only three cases did the pitcher recover to post so much as one season on par with his prior performance: Darryl Kile, Tim Belcher, and Livan Hernandez.
Otherwise, the results were universally horrible, and basically claimed the careers of some pretty good pitchers — Jack Morris, David Cone and Dave Stewart, to name three.
Of course, those pitchers — as well as many others on the list — were in their late 30s and at the end of their careers anyway. Beckett’s down year came at age 30, when there should be plenty of time to return to his All-Star self.
Except the numbers don’t bear that out either. Of the 18 pitchers on the list to have their down year at age 30, only Kile rebounded thereafter. Six-time 20-game winner Wes Ferrell averaged 19-13 with a 3.86 ERA from 1929-1937 with the Guardians and Red Sox. Then he went 15-10 with a 6.28 ERA at age 30 and only won three games the rest of his career.
Or there’s Jaime Navarro. While never anywhere near as good as Beckett, he was pretty decent for a time. He won 17 games in 1992 with the Brewers and his 3.28 ERA ranked 10th in the NL in 1995.
At age 29 in 1996, he went 15-12 with a 3.92 ERA for the Cubs and tossed 236.2 innings. He was considered solid enough to earn $5 million a year from the White Sox in free agency, but during three years on the other side of Chicago, his ERA never dropped below 5.79 and he lost 43 games.
How does this relate to Beckett? Maybe not at all. Few pitchers of his pedigree have ever struggled so mightily during a season in their prime, and it might prove to be the aberration in an otherwise stellar five years.
But it’s worth noting that history is not on his side.