Ann, per Booth's records the following is provided:

Keegan, Daniel, Fifer, Musician, Co. F, N. C. S., 6th La. Inf. En. June 4, 1861, Camp Moore, La.Present on Rolls to June, 1862. Rolls from July, 1862, to Oct., 1862, state sick in Hospl. Rolls from Nov., 1862, to April, 1863, Present. Transfd. to Non-Commsd. Staff, May 18, 1863, Hamilton Crossing. Rolls from May, 1863, to Aug., 1863, Absent, wounded at Winchester June 14, 1863. Rolls from Sept. 1863, to April, 1864, state Present. Present or absent not stated on Roll for May 1 to Aug. 31, 1864. On List of Prisoners of War, Paroled at Appomattox. Court House, Va., April 10, 1865. Res. New Orleans, La., single.

Keegan, James, Pvt. Co. B, 6th La. Inf. En. March 26, 1862, New Orleans, La. Present on Rolls to Oct., 1862, Roll for Nov. and Dec., 1862, Present, with remarks: Wounded at Fredericksburg. Dec. 13, 1862. (Remarks cancelled by line.) Present on Roll for Jan. and Feb., 1863. Roll for March and April, 1863, Absent, sick, at Charlottesville. Roll for May and June, 1863, Killed in
action. Born Ireland, occupation laborer, Res. New Orleans, La., age when enlisted 24, single.

Also per James Gannon's Book "Irish Rebels" (a book on the 6th LA) the following is provided (This is great resource on the 6th, in case you wish to read more about them):

Danial: is noted as Chief Musician; wounded in the left foot at Winchester in '63.

James: Killed at Winchester in '63

Hope this information helps

JIM T