getData — Error in bind_rows_(x, .id) : Column `balls` can't be converted from character to integer

I received this error when retrieving data for the 2012 regular season. When I change the line of code in `getData(...)` from,

`out <- dplyr::bind_rows(ds.list)`

to

`out <- do.call(rbind, lapply(ds.list, data.frame, stringsAsFactors=FALSE))`

the code completes without an error, though `balls` and `strikes` are of type character so they need to be converted to integer: `out <- transform(out, balls = as.integer(balls), strikes = as.integer(strikes))`