This past Thursday, the author endeavored to publish here a pair of leaderboards featuring the top average velocities — as recorded by PITCHf/x — among pitchers currently participating in the Arizona Fall League. What the post ultimately served to document, however, was less a collection of hard-throwing prospects and more the author’s own (and already well-documented) incompetence.

Having failed to communicate with MLB Farm’s Daren Willman before publishing that dispatch, what became clear immediately — by way largely of the enthusiastic comments left by readers — was that the data was incomplete. As a result, certain pitchers who’d definitely appeared in a stadium equipped with PITCHf/x cameras were omitted.

I’ve spoken with Willman in the meantime, however, and — after certain generous efforts on his part — it would appear as though the data is currently as robust at it ever will be. That having been established, what follows is an updated pair of leaderboards featuring the top velocities among those AFL pitchers — both overall and also among starters only — who’ve appeared at either of the two PITCHf/x-equipped stadiums. Following those leaderboards are three observations of limited merit.

The pitch type FF denotes a four-seam fastball; FT, a two-seamer. Count denotes the number of the relevant pitch type to have been recorded by PITCHf/x cameras.

Here are the top average velocities among all Arizona Fall League pitchers:

Top Velocities Among AFL Pitchers, 2015

	Name	Org	Arm	Role	Pitch	Count	Vel
1	Ray Black	SFN	R	RP	FF	29	99.2
2	Nick Burdi	MIN	R	RP	FF	8	98.9
3	Mauricio Cabrera	ATL	R	RP	FF	111	98.5
4	Connor Sadzeck	TEX	R	RP	FF	30	98.1
5	Adam Miller	ARI	R	RP	FF	24	97.7
6	Carlos Estevez	COL	R	RP	FF	73	97.1
7	Damien Magnifico	MIL	R	RP	FF	49	97.0
8	Tanner Scott	BAL	L	RP	FF	81	96.5
9	Josh Hader	MIL	L	RP	FF	8	95.8
10	Austin Brice	MIA	R	RP	FF	25	95.6

SOURCE: MLB Farm

And here the top average velocities among only those AFL pitchers who’ve recorded at least a third of their appearances in a starting capacity:

Top Velocities Among AFL Pitchers, 2015 (Starters Only)

	Name	Org	Arm	Role	Pitch	Count	Vel
1	Alex Reyes	STL	R	SP	FF	78	95.4
2	Adrian Houser	MIL	R	SP	FF	103	94.5
3	Yoan Lopez	ARI	R	SP	FF	109	93.9
4	Luke Weaver	STL	R	SP	FF	116	93.7
5	Nick Travieso	CIN	R	SP	FF	160	93.7
6	Brandon Brennan	CHA	R	SP	FF	22	93.3
7	James Paxton	SEA	L	SP	FF	92	93.2
8	Lucas Sims	ATL	R	SP	FF	91	93.2
9	Yacksel Rios	PHI	R	SP	FF	58	93.0
10	Kyle Freeland	COL	L	SP	FF	74	92.9

SOURCE: MLB Farm

Observations of Limited Merit
• Present on the top leaderboard here, but omitted from the original version, are a number of pitchers about whom readers asked in response to that post from last Thursday. San Francisco prospect Ray Black retains the overall fastest average velocity among AFL pitchers, but Nick Burdi (Minnesota), Mauricio Cabrera (Atlanta), Tanner Scott (Baltimore), and Austin Brice (Miami) all appear among the top 10 now, as well.

• Per the updated data, no fewer than four pitchers now have thrown a pitch at 100 mph or greater: Black, Burdi, Cabrera, and right-handed Texas prospect Connor Sadzeck. Sadzeck remains compelling: despite having worked exclusively in relief this autumn, he’s recorded over 90% of his minor-league appearances in a starting capacity, including 14 of his 18 appearances this year at High-A and Double-A. The results have never been particularly excellent for Sadzeck. That said, the high end of this velocity appears to be a new development.

• St. Louis right-hander Luke Weaver places fourth among starters now not because he was absent from the previous data set, but because he’s recorded an additional start since last Thursday and now qualifies as a starter for the purposes of this exercise. Weaver produced strikeout and walk rates of 20.7% and 4.5%, respectively, over 19 starts and 105.1 innings this year for High-A Palm Beach of the Florida State League.