Red Sox prospect Luis Perales ’ 15 fastballs averaged 99.3 mph in his latest Arizona Fall League start.

But he again struggled with command, allowing three runs (two earned), five hits, one walk and one wild pitch while striking out two in Salt River’s 10-4 loss to Glendale on Sunday.

Of his 54 pitches, he landed 61% for strikes. He landed 60% of his 15 fastballs for strikes.

Only one of his fastballs was under 97.9 mph.

Speeds of each fastball : 98.9 mph, 98.8 mph, 100.4 mph, 99.3 mph, 97.9 mph, 100.5 mph, 99.6 mph, 99.7 mph, 99.6 mph, 98.8 mph, 95.1 mph, 98.7 mph, 99 mph, 99.4 mph, 99.6 mph.

In four starts, Perales has allowed seven runs (six earned), nine hits and eight walks while striking out 11 in 8 innings. He’s topped out at 101.1 mph .

Perales spent most of the 2025 se

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